Invalid FROM/SENDER addresses?

What is everyone's thoughts/expierence with trying to enforce valid FROM e-mail addresses? I work for an organization of 16,000 users and currently any IT person can write a script to send e-mail FROM any address even an invalid one. The problem that I'm seeing is now this e-mail has no valid place to bounce back to if it fails to deliver for whatever reason. This has caused everything from thousands of e-mails queued up on our appliances that have no place to deliver to, to the IT person not being able to track down a simple delivery failure because it couldn't come back to their mailbox. The big concern that I have is when e-mail leaves our environment with an invalid FROM address, I'm guessing this can't be good for our sender reputation. Any thoughts? Do I try to enforce valid FROM/Sender e-mail addresses?
Thanks and LONG LIVE THE NATION!

Just checking to see if there has been any further developments on this topic from CISCO/IronPort.
I took over an installation that had 200+ domains that we hosted and I'm narrowing that down to one. Due to the number of e-mail domains we had the IronPort appliances were basically originally configured to allow anything from our internal network to be delivered. Now that we have consolidated down to only a handful of e-mail domains I am starting to clean this up.
Currently I am just using mail polices that does a LDAP lookup on the sender address and then in a policy following that I use a content filter on the Sender header. Any sent e-mail that misses the LDAP lookup is invalid and then I have a content filter on the following policy looking for that same domain. If the content filter has any hits the sender must not have been in the LDAP and thus invalid.
I also have some e-mail domains that are sending e-mail via my appliances that I don't have access to LDAP for and I guess I could use the Envelope Sender matches dictionary content method.
The challenge that I'm starting to find though is if someone has 'forwarding' turned on an account. Still working to find a way to resolve that.
Anyway, wanted to send the discussion to the top and see if anyone else out there was fighting the good fight.
Long live the Nation!
Jason

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Mail problem - "Sender address was invalid"

So I get this message from time to time: then I try to send an e-mail from the mail app on my iPod Touch, it'll come back to me saying "The Sender Address was invalid" and won't send it. However, it's gotten worse of late; previously, I would hit the refresh button and then it would send, but recently that has stopped working. For about 45 minutes this morning I tried to send an e-mail and it just wouldn't send. I ended up having to log into my e-mail manually (through Safari on my iPod) to get it to send (which worked). However, I would like to know if anyone else has encountered this problem, if anyone knows what causes it, if anyone knows how to solve it, and if it would be worthwhile submitting a bug report to Apple about this. Thanks.

With so many threads and indy websites posting this problem, I'm not sure where's best to post my solution. So it's here and I hope someone gets help from it.
Same thing - "sender address blah blah blah" and none of the fixes worked. So I deleted the outgoing server (or so I thought!) and restarted the iPod. The server was not listed.
Then I reentered the information and used Port 25 (I had tried that before but went back to the default port of 587 before deleting the old server).
I connected to my WiFi and my mail went thru immediately. But what was interesting was the 'old' server showed up as the backup with port 587. I don't dare touch a thing - it's working!
BTW, I am using my own website and mail servers (hosted elsewhere).
Interestingly, if the iPod is accessing the mail servers, the computer access is blocked. Probably my host no allowing multiple connections from the same location, but I've done that before with my laptop and other Macs here w/o a hitch. But really a big deal, but interesting.
Thanks to all who have posted in this thread and all the other threads. Together, we ARE tech support! But the Apple guys and gals are great as well. And this iPod Touch is AMAZING!

E-mail error: Cannot Send Mail: The sender address was invalid

I can receive e-mail but cannot send it. Everything goes to my outbox. I did not change any settings. Nothing has changed that I know of. For months I could send e-mail -- now I cannot. I even e-mailed myself, and it says the sender address is invalid. Can anyone help? Thanks!

The "Recipient addresses are invalid" message is misleading.
Most ISP's don't allow you to send email through their SMTP server unless you are A) on their network (e.g. connected via wi-fi to a cable connection provided by your ISP) or B) you authenticate to their SMTP server.
On Blueyonder here in the UK (my ISP), you can send via their SMTP server from the iPhone over 3G as long as you authenticate to it. I setup my Mac mail to authenticate on outbound email sent via smtp.blueyonder.co.uk and it works fine. I then synced the mail settings to my iPhone and it works fine (although a little slow to send).
Alternatively your cellular provider usually runs their own SMTP server to which you will also have to authenticate, and you can send through it. For the iPhone in the UK O2 are the exclusive provider, and they have the smtp.02.co.uk gateway.

Mailer object error message "SMTP: invalid from address. SMTP error 530 5.7.0 Must issue a STARTTLS command first. d5sm35857280yhl.19".

I am trying to send an email from Lookout V6.6 using the Mailer object. I have an email address setup through GMAIL and have verified it works. Also, Lookout Mailer object is able to verify GMAIL server. I get the following error message when trying to send the email: "SMTP: invalid from address. SMTP error 530 5.7.0 Must issue a STARTTLS command first. d5sm35857280yhl.19". Anyone know what is causing this?

Another method is to use a SMTP relayer, we have deployed them in the past.
http://www.hmailserver.com/index.php?page=welcome
Mike
Forshock - Consult.Develop.Solve.

Cannot send e-mail - "The sender address invalid" error message

Today I keep getting this error message "The sender address is invalid - when i try to send e-mail. I checked my settings and they are the same as always - my e-mail address hasn't changed; the outgoing and incoming server information is the same. I went through the Troubleshooting steps and still nothing. Also it's taking a really long time to connect to check for incoming e-mails. Any clues on why this is happening or what I should try next? The e-mail is via Roadrunner does that matter (althoug it didn't a couple of days ago)

This message means that your outgoing email server is not letting you connect to send email. Maybe RR changed their policy. You should be able to send using home WiFi, but when using 3G RR will not allow connections from outside their network.
One easy way around this, is to use the built-in AT&T SMTP server for outgoing email.
Or, check the RR FAQs and see if they allow an authenticated account to send email - maybe you just need to add SSL and username/pwd on the RR outgoing email server settings.
BTW - this is asked almost daily - the "Search Discussions" box to your right would have given you many hits with the same answer.

IPhone 3G Cannot Send Mail. The sender address was invalid.

All of a sudden, I cannot send mail. I get the message "Cannot Send Mail" The sender address was invalid.
I have reset the phone in hopes of resolving the problem. That did not work.
The mail that I'm sending to IS a valid address; I'm trying to RESPOND.
Please help.

The configuration and use of any outgoing server address (SMTP) may not be supported due to several factors including, but not limited to, the inability for the outgoing server (SMTP) to authenticate users (whether by IP or username/password) that are not directly connected to that Internet Service Providers(ISPs) network.
This is usually your HOME wi-fi and you are not connected to it because you are on your iPhone away from the house. This is mainly done to prevent unsolicited users from sending SPAM via the ISP's servers.
An alternative is to use ATT SMTP Server (for US) when you are on the 3G or data network for the carrier and not on your home wi-fi. So enable ATT SMTP server under Other SMTP servers under your Mail's account settings on the iPhone.
If you are interested you can obtain that information directly from the email provider. This article has a great temple that you can use to ask all necessary information from the provider including "If you use your ISP’s own email service (instead of a third-party such as Gmail), sometimes it may not work if you use another Internet access point, such as a cafe with wireless Internet. Ask your email provider if the settings they give you will work on other networks."
What to ask if you're having issues sending, receiving, or configuring Mail
http://support.apple.com/kb/HT1277

Roadrunner/cwmx and Invalid sender address problems

I have spent hours trying to fix problem with Road Runner email when not connected to rr via wifi.
Background: rr doesn't allow smtp outgoing if you aren't connected to their cable. Thus you have to be on wifi from your cable router. So, many folks turn on ATT cwmx.com smtp server to send mail when on 3G or Edge. iPhone email is supposed to try next smtp server if first one fails. But when sending mail many folks are getting "Invalid sender address" error message.
I had thought the error message was coming from cwmx but now think that it is coming from road runner's smtp server and the iPhone is not going on to the next smtp server, i.e. cwmx.com.
Maybe this is the problem/bug. I know there are some other bugs in iPhone mail app. For example I have 4 smtp servers showing in "Other SMTP servers" all with the same address and there is no way to delete the duplicates.

It is usually the ISP being used for the internet connection with the SMTP server restriction.
Most, if not all ISPs block the use of SMTP servers that are outside of their network (or that isn't provided by the ISP) unless the SMTP server is authenticated.
Most ISPs don't provide/support an authenticated SMTP server, and Time Warner is one of them. If TW provided/supported an authenticated SMTP server for RoadRunner accounts, using RR's SMTP server wouldn't be an issue regardless the internet connection.
I access my MobileMe account and a business POP account with the iPhone's Mail client. Both accounts have an authenticated SMTP server and I've never had a problem sending with either account regardless my internet connection - via numerous wi-fi connections with different ISPs or via EDGE with my first generation iPhone, or via 3G or EDGE with my iPhone 3G.
These restrictions are in place as a part of an overall effort to prevent spam emanating from the ISP's domain.

I cannot send email - error message as follows : 'The sender address (my email address) was rejected by the server smtp.tiscali.co.uk.' I can send email from other apple devices, and the email settings are identical. Any ideas?

For some reason I cannot send email - all was working fine, but now I get the following error message when I try to send email:
'The sender address (my email address) was rejected by the server smtp.tiscali.co.uk'
I can receive incoming mail ok and I can send email from other Apple devices. The problem seems confined to my Mac Book Pro.
Ant ideas?

Hello there, Pablo639.
The following Knowledge Base article offers up some great steps for troubleshooting mail issues on your Mac:
OS X Mail: Troubleshooting sending and receiving email messages
http://support.apple.com/kb/TS3276
Thanks for reaching out to Apple Support Communities.
Cheers,
Pedro.

Hi, I have just set up my domain email address with google and Im trying to set up mail on my mac. Its receiving mail but its not letting me send emails from that address. I have tried quite a few solution but cant figure it out. Can anyone help

Hi, I have just set up my domain email address with google and Im trying to set up mail on my mac. Its receiving mail but its not letting me send emails from that address. I have tried quite a few solution but cant figure it out. Can anyone help

Hi Lawrence1981,
Thanks for visiting Apple Support Communities.
You may want to check this article for additional troubleshooting steps:
OS X Mail: Troubleshooting sending and receiving email messages
http://support.apple.com/kb/ts3276
Cheers,
Jeremy

How can I fake my FROM email address to look like I'm sending it from work?

I want to not have to log into my work webmail everyday and I want to just use MobileMe. I have all my work mail forwarded to MobileMe. The problem is that I don't want to ever have to log into work mail to send a message. How can I fake my from email address to look like I'm sending it from work?

You can't do that with MobileMe. MobileMe's mail servers will only accept senders from their own domains (@mac.com and @me.com). No other senders, not even from configured personal domains, will be accepted.
You will either have to use your companies SMTP server or, if not public available, your companies webmail.

When I send a Group message from my address book, the entire group gets listed in the "To" line. How do I get each member to receive the message individually without listing all members? Its just messy is all.

When I send a Group message from my address book, the entire group gets listed in the "To" line. How do I get each member to receive the message individually without listing all members? Its just messy is all. Any help is greatly appreciated.

Hey Grupo Castillo,
Thanks for the question. You can actually configure this behavior from Mail preferences:
1. Choose Preferences from the Mail menu.
2. Click Composing.
3. Deselect the checkbox for "When sending to a group, show all member addresses".
When you send an email to the group, only the groups name will be seen.
Mac OS X: Mail - How to Hide Address Book Group Member Names When Sending an Email
http://support.apple.com/kb/TA21082
Thanks,
Matt M.

When I send a text to another phone, it shows up on the other phone as coming from email address and not from phone number.

I just came over from Sprint 4 days ago and had my number ported over. When I send a text to another number, it shows up on the other phone as coming from email address and not my phone number. For example, if the recipient of the text has me in the contacts as "Tom", the text comes to them displaying my email address instead of "Tom".

cfm007,
Welcome to our family. We want you to be able to enjoy all the services we provide and we definitely need to address this. Do you receive/make calls without problems? Are you able to receive messages with your contacts' number? Are you using iMessages? If so, go to Settings>Messages>Send&Receive>only your phone number should be enabled.
AdaS_VZW
Follow us on Twitter at @VZWSupport

HT1277 I have OS X 10.9.2 and have downloaded maverick. If I am sending an email message to one person, options for addresses from my address book show up. However if I want to send it to more than one person, the address options for the others do not sh

I have OS X 10.9.2. and have downloaded Maverick. If I am sending an email message to one person, options for addresses from my Address Book appear. However if I want to send it to more than one person, the potential addresses for the other persons do not show. Can you please help?

Install ClamXav and run a scan with that. It should pick up any trojans.
17" 2.2GHz i7 Quad-Core MacBook Pro  8G RAM  750G HD + OCZ Vertex 3 SSD Boot HD 
Got problems with your Apple iDevice-like iPhone, iPad or iPod touch? Try Troubleshooting 101

When I try to send e-mail I get an error message stating that the e-mail address was rejected by the server. When I send to e-mail from another address, I get back an error saying the e-mail address is unknown. My e-mail has worked fine for years until

When I try to send e-mail I get an error message stating that the e-mail address was rejected by the server. When I send to e-mail from another address, I get back an error saying the e-mail address is unknown. My e-mail has worked fine for years until yesterday. HELP!

The specific text of the error message is very important here — I'm not sure exactly you're encountering here.
If you're able to connect to your email server and are able send email to other email addresses and if the failures are specific to one email recipient address, then please contact the intended recipient of the failing email, and confirm their address is valid. (This is the way I'm reading your question.)
If you are unable to send any email to any other email addresses and this is specific to your email address, then try the web mail client interface (if one is available) to verify your login user and password, and check with your email ISP for assistance. If your email password works via web mail, follow this Apple troubleshooting guide, then — if everything else fails — I'd probably then entirely remove the email account from Mail.app and re-add it per your email ISP's particular setup requirements. (Some issue with the setup or maybe a corrupt setting in OS X or a problem at the mail ISP servers is a common problem, but this effects attempts to send to all email addresses via that account.)
An email account setup is specific to an email provider, unfortunately. If you're using one of the more common email ISPs, then there are usually setup guides and frequently-asked questions posted online.

Invalid sender address

Hi,
I have to send an email, but the sender address may be invalid, in which case I should suppy a "default" valid address. Is it possible to check that address before calling Transport.send(Message m, Address[] a)? Is there any isAddressValid() method?
Thanks,
Mgalois

No, an application cannot, but a library can. I finally found a solution: first I perform a "local" check of the email address (if @ char isn't present, if a dot isn't present after the index of @ etc.) then I send the message and check the exception message. If the message contains the string "Domain of sender address <the_address> does not exist" then the address isn't valid.

Invalid FROM/SENDER addresses?

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