What is POP, POP3, and IMAP When I Setup My Email Account in the HP ePrint App?

Question

I have done as much research as I can do in regards to setting up the HP ePrint App Email Accounts.  If you do not see your email information listed here, feel free to post it below or contact your internet service provider, phone or email company, or whomever else that might know this. I am certain there are many more that could be added but this is a rather extensive list.  I hope you find what you need to finish setting up your email applications.
I have noticed information differs from website to website but as I have learned over time, with domain masking and companies buying out other companies, I just researched all the information I could find and that way if one of the hostnames or ports don’t work, then you can continue to view further into this page to see if that information is the same. At that point, if you can’t find what you need here, I would say you have done all that you can do before contacting the appropriate support team for your email information.  
Most of the links are active and the ones listed below should send you directly the pages I pulled this information from but only a few of them were from the actual support sites themselves (Apple support was vague, as well as Microsoft, Macintosh, and commonly used ISPs). Save yourself some time by searching here first. I hope you find what you need in this one-stop-shop and if you get an email address not listed here please post it below and I will add it to this original document.
Lastly, as this information is from forum-based and other unofficial websites, I would like to add that this is a copy/paste/edit-for-easy-reading document I created in my spare time. This is a very long document so I do recommend using the search and find quick keys to search for the email you need but the top part of this has definitions as to what servers, ports, and hostnames are and the basic setup in case you need to know what these options are used for and what they mean.
Below are the most common settings needed to set up most POP3/IMAP Email Clients or Devices:
The following information below can be found at http://www.swestcom.com/Support/q4.htm
“What is POP3?
Post Office Protocol version 3 (POP3) is a standard mail protocol used to receive emails from a remote server to a local email client. POP3 allows you to download email messages on your local computer and read them even when you are offline."
"What is IMAP?
The Internet Message Access Protocol (IMAP) is a mail protocol used for accessing email on a remote web server from a local client. IMAP and POP3 are the two most commonly used Internet mail protocols for retrieving emails. Both protocols are supported by all modern email clients and web servers."
"Main difference between IMAP and POP3:
The POP3 protocol assumes that there is only one client connected to the mailbox. In contrast, the IMAP protocol allows simultaneous access by multiple clients. IMAP is suitable for you if your mailbox is about to be managed by multiple users."
"What is SMTP?
Simple Mail Transfer Protocol (SMTP) is the standard protocol for sending emails across the Internet. SMTP uses TCP port 25 or 2525 and sometimes you can have problems to send your messages in case your ISP has closed port 25 (How to check if port 25 is open?). To determine the SMTP server for a given domain name, the MX (Mail eXchange) should have more information."
"When setting up:
POP - choose POP and the incoming server port will default to 110
IMAP - choose IMAP and the incoming server port will default to 143
All other settings are the same.
Username = [email protected]
Password = the password you set up when you configured your mail box
Incoming Mail Server = mail.yourdomain.com
Outgoing Mail Server= smtp.yourdomain.com
Outgoing Server Requires Authentication (typically found in advanced options or settings)
Do NOT check "Log on Using Secure Password Authentication"
Use the same Username and Password as Incoming or select "Use Same Settings as Incoming"
Outgoing Server Port= 2525 or 587This is subject to change based on the individual preferences of your ISP"
Note - Substitute your actual domain name for "yourdomain.com" and substitute the first part of your email address for "user."
Email Ports
For networks, a port means an endpoint to a logical connection. The port number identifies what type of port it is. Here are the default email ports for:     
POP3 - port 110
IMAP - port 143
SMTP - port 25
HTTP - port 80
Secure SMTP (SSMTP) - port 465
Secure IMAP (IMAP4-SSL) - port 585
IMAP4 over SSL (IMAPS) - port 993
Secure POP3 (SSL-POP) - port 995.
For Mozilla, Outlook, Windows mail, Windows Live, Outlook 2003-2010, Entourage for Mac OS, and Mail for Mac OS follow this link: http://help.outlook.com/en-ca/140/cc875899.aspx    (this website has not been looked over for validation but may assist in other leads towards the right direction)
Have you ever wished you could use your AOL email account with something else, something more powerful, something more convenient than AOL, something like Outlook, Windows Mail, Outlook Express, or The Bat!? Thanks to the wonders of IMAP, you can.
If you set up your AOL email account in any email client capable of IMAP, you can receive and send messages easily. Even the AOL folders — Spam, Saved, Sent Items and your Trash will be there automatically. Of course, you can also use POP to fetch incoming mail in an uncomplicated fashion.
For instructions on how to assist you with this you can also follow this link: http://email.about.com/od/aoltips/qt/Access_an_AOL_Email_Account_with_any_POP_IMAP_Email_Program.htm
Set Up POP or IMAP E-Mail on an Android G1 How do I set up POP or IMAP E-Mail on an Android Device?
From the home screen, tap Applications > Settings > Accounts & sync > Add account > Manual setup.
On the Incoming settings screen, in the Protocol drop-down menu, select IMAP or POP3. We suggest you select IMAP because it supports more features.
In the Email address and Username text boxes, enter your full e-mail address, for example [email protected], and then select Next. Your user name is the same as your e-mail address.
In the Password text box, enter your password.
In the IMAP server or POP3 server text box, enter your IMAP or POP server name. For information about how to look up the server settings you need to complete this step and other steps in this procedure, see “How do I find the server settings” later in this topic.
In the Security type drop-down menu and Server port text boxes, specify the POP or IMAP settings that you looked up in step 5, and then tap Next. Your e-mail application will check your IMAP or POP settings.
On the Outgoing server settings screen, the Login required option should be selected for you, and the Username and Password text boxes should be filled in.
In the SMTP server text box, enter the SMTP server name you looked up in step 5.
In the Security type drop down menu and Server port text box, specify the SMTP settings that you located in step 5, and click Next.
In the Account name, text box, enter a name for your account (for example “Office 365 email” or “Work email”). In the Your name text box, enter the name you want displayed when you send e-mail to others (for example “Tony Smith”), and then select Finish Setup.
What else do I need to know?
If your e-mail account is the type that requires registration, you must register it the first time you sign in to Outlook Web App. Connecting to your e-mail account through a mobile phone will fail if you haven't registered your account through Outlook Web App. After you sign in to your account, sign out. Then try to connect using your mobile phone. For more information about how to sign in to your account using Outlook Web App, see How to Sign In to Your E-Mail Using a Web Browser. If you have trouble signing in, see FAQs: Sign-in and Password Issues or contact the person who manages your e-mail account.
Information below provided by: http://www.defcon-5.com/support/index.cfm?docid=95
Yahoo:
POP3: pop.mail.yahoo.com Port 995
SMTP: smtp.mail.yahoo.com Port 465
ESMTP should be enabled
SSL: YES
User name must not include the @yahoo.com
GMail:
POP3: pop.gmail.com Port 995
SMTP: smtp.gmail.com Port 465
ESTMP should be enabled
SSL: YES
AOL:
IMAP: imap.aol.com Port 143
SMTP: smtp.aol.com
SSL: NO
ATT World Net:
POP3: ipostoffice.worldnet.att.net Port 995
SMTP: imailhost.worldnet.att.net Port 465
SSL REQUIRED for Incoming and Outgoing
Cox:
NOTE: With Cox you can only use their SMTP servers while on their network.
Central
POP3: pop.central.cox.net
SMTP: smtp.central.cox.net
ESMTP should be enabled
SSL: NO
East Cost
POP3: pop.east.cox.net
SMTP: smtp.east.cox.net
ESMTP should be enabled
SSL: NO
West Cost
POP3: pop.west.cox.net
SMTP: smtp.west.cox.net
ESMTP should be enabled
SSL: NO
Comcast:
POP3: pop3.comcast.net Port 110
SMTP: smtp.comcast.net Port 587
ESMTP should be enabled
SSL: NO
User name must NOT include @comcast.net
Comcast SMART ZONE:
POP3:  sz-pop.mail.comcast.net Port 995
SMTP: smtp.compcast.net Port 587
ESMTP should be enabled
SSL: NO
User name must NOT include @comcast.net
Earthlink:
POP3: pop.earthlink.net Port 110
SMTP: smtpauth.earthlink.net Port 587
ESMTP should be enabled
SSL: NO
User name must include @earthlink.net
Hughes Net:
POP3: mail.hughes.net Port 110
SMTP: smtp.hughest.net Port 25
ESMTP should be enabled
SSL: NO
User name must include @hughes.net
Metrocast:
POP3: pop.va.metrocast.net Port 110
SMTP: smtp.va.metrocast.net Port 25
ESMTP should NOT be enabled
User name MUST be full email address
SSL: NO
MSN:
POP3: pop 3 . live. com  port #995.
SMTP: smtp.live. com port #25
SSL: YES
ESMTP: should be enabled
User name must have the full email address
NetZero:
POP3: pop.netzero.com Port 110
SMTP: smtpauth.netzero.com Port 25
ESMTP should be enabled
SSL: NO
User name must include @netzero.com
Verizon:
POP3: incoming.verizon.net Port 110
SMTP: outgoing.verizon.net Port 25
ESMTP should be enabled
SSL: NO
The following information is according to a forum comment at the bottom of this webpage concerning HOTMAIL and mail server settings:
 “As other web based email services, Hotmail is using the HTTP protocol for connecting you to your mailbox. If you want to send and receive Hotmail emails using an email client software, then your software must support Hotmail HTTP access for your email account. Some email clients, such as Outlook Express or Microsoft Outlook, offer builtin support for Hotmail accounts, so you only have to select HTTP when you are asked to select your email account type and select Hotmail as the HTTP Mail Service Provider.”
Mail Server Settings for Hotmail using the Microsoft Outlook Connector
If you are using Microsoft Outlook & the Outlook Connector, you can define your Hotmail account just like any regular POP3 email account:
Hotmail Incoming Mail Server (POP3) - pop3 . live. com  (logon using Secure Password Authentification - SPA, mail server port: 995)
Hotmail Outgoing Mail Server (SMTP) -smtp . live . com (SSL enabled, port 25)
Additional information from this website has not been confirmed or validated as of yet but it does include additional information or perhaps corrected information. If the above steps do not fix the problem with setting up an email account for the HP Apps then read on:
Yahoo! Mail Settings
Yahoo Mail offers standard POP3 access for receiving emails incoming through your Yahoo mailbox, by using your favorite email client software. To setup your email client for working with your Yahoo account, you need to select the POP3 protocol and use the following mail server settings:
Yahoo Incoming Mail Server (POP3) - pop.mail.yahoo.com (port 110)
Yahoo Outgoing Mail Server (SMTP) - smtp.mail.yahoo.com (port 25)
POP Yahoo! Mail Plus email server settings
Yahoo Plus Incoming Mail Server (POP3) - plus.pop.mail.yahoo.com (SSL enabled, port 995)
Yahoo Plus Outgoing Mail Server (SMTP) - plus.smtp.mail.yahoo.com (SSL enabled, port 465, use authentication)
· Google GMail Settings
The Google GMail service offers email client access for retrieving and sending emails through your Gmail account. However, for security reasons, GMail uses POP3 over an SSL connection, so make sure your email client supports encrypted SSL connections.
Google Gmail Incoming Mail Server (POP3) - pop.gmail.com (SSL enabled, port 995)
Outgoing Mail Server - use the SMTP mail server address provided by your local ISP or smtp.gmail.com (SSL enabled, port 465)
 MSN Mail Settings
The MSN email service allows you to use the MSN POP3 and SMTP servers to access your MSN mailbox.
MSN Incoming Mail Server (POP3) - pop3.email.msn.com (port 110, using Secure Password Authentication - SPA)
MSN Outgoing Mail Server - smtp.email.msn.com (select "My outgoing server requires authentication")
 Lycos Mail Settings
The Lycos Mail Plus service allows you to use POP3 and SMTP servers for accessing your Lycos mailbox.
Lycos Mail Incoming Mail Server (POP3) - pop.mail.lycos.com (port 110)
Outgoing Mail Server - smtp.mail.lycos.com or use your local ISP SMTP mail server
 AOL Mail Settings
The AOL email service is a web based system, designed for managing your AOL mailbox via HTTP IMAP access. Unlike Hotmail, you can use any email client to access your AOL mailbox, as long as it supports the IMAP protocol.
AOL Incoming Mail Server (IMAP) - imap.aol.com (port 143)
AOL Outgoing Mail Server - smtp.aol.com or use your local ISP SMTP mail server
 Mail.com Mail Settings
The Mail.com email service allows you to use POP3 and SMTP servers for accessing your Mail.com mailbox.
Mail.com Mail Incoming Mail Server (POP3) - pop1.mail.com (port 110)
Outgoing Mail Server - use your local ISP SMTP mail server
 Netscape Internet Service Mail Settings
The Netscape e-mail system is web-based, which means you can access their e-mail from any Internet connection. Netscape Internet Service also supports AOL® Communicator, Microsoft® Outlook, Microsoft® Outlook Express, and other POP3 e-mail software. The outgoing mail server needs SSL support, so make sure your email client software supports SSL connections over the SMTP protocol.
Netscape Internet Service Incoming Mail Server (POP3) - pop.3.isp.netscape.com (port 110)
Netscape Internet Service Outgoing Mail Server - smtp.isp.netscape.com (port 25, using a secure SSL connection)
Tiscali Mail Settings
The Tiscali email service allows you to use POP3 and SMTP servers for accessing your Tiscali mailbox.
Tiscali Incoming Mail Server (POP3) - pop.tiscali.com (port 110)
Outgoing Mail Server - use your local ISP SMTP mail server
Freeserve Mail Settings
The Freeserve email service allows you to use POP3 and SMTP servers for accessing your Freeserve mailbox.
Freeserve Incoming Mail Server (POP3) - pop.freeserve.com (port 110)
Outgoing Mail Server - use your local ISP SMTP mail server
Supanet Mail Settings
The Supanet email service allows you to use POP3 and SMTP servers for accessing your Supanet mailbox.
Supanet Incoming Mail Server (POP3) - pop.supanet.com (port 110)
Outgoing Mail Server - use your local ISP SMTP mail se
AT&T SMTP IMAP Server
smtp.att.yahoo.com
SSL Port 465
imap.att.yahoo.com
SSL Port 993
Iphone POP/IMAP Setup
Although I am sure it is out of scope for HP to assist with iPhone setup with mail, contact, calendars, etc so here is a PDF with pictures and a walkthrough from:
https://www.millikin.edu/it/services/HandH/Documents/iPhone%20IMAP%20POP%20Setup.pdf 
This hyperlink seems inactive so you may have to copy and paste for a direct walkthrough of this comprehensive pdf.
Lastly if the above information is incorrect or does help, here is one last website to provide you with a complete list that I found located at att.com to assist their customers trying to setup emails in conjunctions with their apps.
 Popular POP and IMAP e-mail providers and their incoming server names
http://www.wireless.att.com/support_static_files/KB/KB5892.html
SUBJECT:
Popular POP and IMAP e-mail providers and their incoming server names
What are the AT&T outgoing (SMTP) server names?
SYMPTOM:
ISP E-mail servers
 E-mail
ADVISORY:
This information has been retrieved from the proper e-mail provider support pages. This is not an exhaustive list, please refer to your e-mail provider for additional information and compatibility.
FIX:
Outgoing Servers
AT&T outgoing SMTP server policy
Incoming Servers
Users must contact their e-mail service providers for server addresses not included in this list.
Incoming POP3 server uses default port of 110.
Incoming IMAP4 server uses default port of 143.
When using SSL (Secure Socket Layer):
The incoming POP3 port needs to be set to 995.
The incoming IMAP4 port needs to be set at 993.
Internet Service Provider (ISP)
Incoming Server Address
Username
Port
1and1.com
POP: pop.1and1.com
IMAP4: imap.1and1.com
More information at 1and1.com Article.
full e-mail address
POP3: 110
IMAP4: 143
Adelphia
mail.adelphia.net
username only
POP3: 110
Airmail.net (Internet America)
pop3.airmail.net
username only
Alltel.net
(See Windstream)
Ameritech (at&t Yahoo!)
pop.att.yahoo.com
More information on support article.
full e-mail address
POP3: 995
uses SSL
AOL (America Online)
Instructions and Disclaimer
username only
IMAP4: 143
AIM Mail
Instructions and Disclaimer
username only
IMAP4: 143
AT&T Broadband Internet (ATTBI)
mail.attbi.com
AT&T Worldnet
ipop.worldnet.att.net
-or-
ipostoffice.worldnet.att.net
Informational only:
AT&T WorldNet e-mail may not be accessible from any device e-mail client due to firewall restrictions implemented by AT&T WorldNet.
See alternatives for accessing AT&T WorldNet:
- Former AT&T Wireless customers
- New and Existing AT&T wireless services customers
full e-mail address
POP3: 995 uses SSL
Bell Atlantic (Verizon)
pop.bellatlantic.net
Bell South
mail.bellsouth.net
username only
Cable One
mail.cableone.net
More information at Cable One.
username only
Cablevision
mail.optonline.net
username only
Charter
pop.charter.net
username only
Clearwire
mail.clearwire.net
More information at Clearwire Article.
full e-mail address
POP3: 110
Comcast
mail.comcast.net
More information at Comcast Article.
username only
POP3: 110
ComNetcom.net (Earthlink)
pop.comnetcom.net
Compuserve Classic
pop.compuserve.com
Compuserve
imap.cs.com
username only
Concentric
pop3.concentric.net
Coqui (Puerto Rico)
pop.coqui.net
Covad
pop3.covad.net
More information on support article.
full e-mail address
POP3: 110
Cox Central
pop.central.cox.net
More information at Cox Article.
username only
POP3: 110
Cox East
pop.east.cox.net
More information at Cox Article.
username only
POP3: 110
Cox West
pop.west.cox.net
More information at Cox Article.
username only
POP3: 110
Cox Business
pop.coxmail.com
More information at Cox Business Article.
full e-mail address
POP3: 110
Earthlink
pop.earthlink.net
full e-mail address
POP3: 110
Eudora
mail.speakeasy.net
Excite
pop3.excite.com - Requires "Premium/Gold" subscription for POP3 access. More information at Excite.com Article.
full e-mail address
POP3: 110
Flash (SBC Yahoo!)
pop.att.yahoo.com
More information on support article.
full e-mail address
POP3: 995
uses SSL
Gmail (Google Mail)
Instructions and Disclaimer
full e-mail address
POP3: 995 uses SSL
Go Daddy.com
pop.secureserver.net
More information at Go Daddy.com Article.
full e-mail address
POP3: 110
Grande
mail.grandecom.net
More information at Grande Article.
username only
POP3: 110
GTE.net (Verizon)
mail.gte.net
Hughes Direcway
mail.hughes.net
More information at Hughes Direcway Article.
full e-mail address
POP3: 110
Ix.Netcom.com (Earthlink)
pop.ix.netcom.com
Insight Broadband
mail.insightbb.com (SSL must be enabled for remote access)
More information at Insight Broadband Article.
username only
Juno
POP3/IMAP4 is not available.
More information on support article.
Lightfirst (Avenew)
inmail.lightfirst.com
Mac.com (Apple Computer)
mail.mac.com
POP3 access will not work with "alias" accounts.
More information at Mac.com. Related articles 25275, 51729, and 86685.
username only
POP3: 110
IMAP4: 143
Mail.com
pop1.mail.com
POP3: 110
Mediacom
mail.mchsi.com
More information at Mediacom Article.
full e-mail address
POP3: 995 uses SSL
MEdia Net
POP3 access is currently not available to MEdia Net e-mail accounts. Please access MEdia Net e-mail through the device browser.
POP3: 110
Mindspring (Earthlink)
pop.mindspring.com
full e-mail address
POP3: 110
mMode
pop.mymmode.com
username only
POP3: 110
MSN
pop3.live.com
For subscribers that use (and pay for) MSN as their Internet Service Provider, MSN provides POP3 access to their e-mail. More information on configuring e-mail applications, see Microsoft Article 930008.
Alternatives for accessing MSN from a mobile device:
- Former AT&T Wireless customers
- New and Existing AT&T wireless services customers
full e-mail address
POP3: 995
uses SSL 
MSN Hotmail
MSN Hotmail is a HTTP e-mail service so a POP3 server name is not offered by MSN Hotmail. While some 3rd party e-mail servers allow access to Hotmail accounts, this may put e-mail security at risk. AT&T will not house 3rd party e-mail server information.
Alternatives for accessing MSN Hotmail from a mobile device:
- Former AT&T Wireless customers
- New and Existing AT&T wireless services customers
NetAddress or Usa.net
pop.netaddress.com
POP3: 110
Network Solutions
mail.yourdomain.com
Network Solutions Support Page
full e-mail address
POP3: 110
NetZero (United Online)
pop.netzero.com
NetZero E-mail Support Page
username only
POP3: 110
Netscape
pop3.isp.netscape.com
Netscape E-mail Support Page
full e-mail address
POP3: 110
NVBell (SBC Yahoo!)
pop.att.yahoo.com
More information on support article.
full e-mail address
POP3: 995
uses SSL
OptOnline
mail.optonline.net
OptOnline Support Article
username only
PacBell (SBC Yahoo!)
pop.att.yahoo.com
More information on support article.
full e-mail address
POP3: 995
uses SSL
PeoplePC
mail.peoplepc.com
- or -
pop.peoplepc.com
PeoplePC Support Article
full e-mail address
POP3: 110
Pipeline (Earthlink)
pop.pipeline.com
POP3: 110
Prodigy (SBC Yahoo!)
pop.att.yahoo.com
More information on support article.
full e-mail address
POP3: 995
uses SSL
Qwest in Albuquerque, New Mexico
pop.albq.qwest.net
POP3: 110
Road Runner
pop-server.xxxx.com
"xxxx" equals the users e-mail domain, which can be in the region format ("cfl.rr" for Central Florida or "nyc.rr" for New York City) or simply "roadrunner". The domain can be found after the @ symbol in the e-mail address i.e. [email protected] or [email protected]
Road Runner Support Pages - Choose the appropriate region/state and select the Help menu to locate e-mail settings as they are different based on each region/state.
 username only
POP3: 110
sbcglobal.net
pop.att.yahoo.com
More information on support article.
full e-mail address
POP3: 995
uses SSL
snet.net
pop.att.yahoo.com
More information on support article.
full e-mail address
POP3: 995
uses SSL
Surewest
pop.surewest.net
More information at Surewest Article.
full e-mail address
POP3: 110
swbell.net
pop.att.yahoo.com
More information on support article.
full e-mail address
POP3: 995
uses SSL
Verizon
incoming.verizon.net
username only
POP3: 110
Verizon (custom server)
pop.verizonemail.net
POP3: 110
Verizon (Yahoo! Mail)
incoming.yahoo.verizon.net
More information at Verizon Yahoo! Article.
full e-mail address
POP3: 110
wans.net
pop.att.yahoo.com
More information on support article.
full e-mail address
POP3: 995
uses SSL
Websitepros
Server information varies on product.
Contact Information
Windstream
pop.windstream.net
More information on support article.
full e-mail address
POP3: 110
Yahoo!
pop.mail.yahoo.com - Requires a monthly subscription fee for POP3 access.
More information on support article.
See Alternatives for accessing Yahoo! E-mail:
- Former AT&T Wireless customers
- New and Existing AT&T wireless services customers
username only
POP3: 995
uses SSL
Yahoo Small Business
pop.bizmail.yahoo.com
"Forwarding" must be disabled and "POP access" must be enabled. Yahoo Small Business Support Page
SPAM/Bulk folders should be emptied if receiving errors occur.
full e-mail address
POP3: 110
If you are viewing information on devices or services, please note: content reflects instructions for devices and services purchased from AT&T. Some differences may exist for devices not purchased from AT&T.
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Answer 1

Just to recap, this is a collection of ports I have collected over time for people who needed this information when setting up the HP ePrint app so that they could view their email from within the app.  I am certain other applications also need this information.  Although lengthy, I could not find a more comprehensive place to retrieve this information.  Feel free to post additional information, faulty information, or other related topics below as this is simply a collection of data and it would be practically impossible to test all of them. Thank you!
Don't forgot to say thanks by giving "Kudos" if I helped solve your problem.
When a solution is found please mark the post that solves your issue.
Every problem has a solution!