Able to receive e-mail but unable to send.

Hi,
I've had my Macbook Pro since January and have my e-mail accounts set up through mail. About a week ago my cox accounts stopped sending email. The error states that the server does not recognize the smpt account. I called Cox and everything is working on their end. I can send and receive from the webmail site and my smtp is set up properly.
I tried deleting the mailbox to re-set it, but it doesn't delete. It asks me if I'm sure I want to delete; I click yes; it's still there.
Any help will be greatly appreciated!

You need to make sure your Outgoing mail Server is correct in Mail>Accounts>Accounts Setup. In any case SL Mail and AddressBook forum is here:
http://discussions.apple.com/forum.jspa?forumID=1338

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Hi everybody,
Whenever I send an e-mail I get this X sign and a message saying "Service Blocked". However, I can receive e-mails and it says Received As Desktop (Secure). I contacted Saudi Telecom and they assured me that my account is BES and they even showed me that in the screen.
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Hello naserals
I can tell you with 100% certainty that you do not have to correct
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provisioning is correct tell them you want to talk to a supervisor because it
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-SR
Come follow your BlackBerry Technical Team on twitter! @BlackBerryHelp
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Can receive mail, but unable to send mail

am able to receive mail, but unable to send any whether through Mail or Entourage.
didn't have this problem yesterday. Strangely enough, i am still able to send mail through my yahoo.com account. so there's nothing wrong with my connection.
is there any fix to the problem encountered in my Mail.app?

Did you accidently change the port through which you send mail?
What smtp server do you use to send mail out? and please check the port number of that outgoing mail. It should be 25 for your own internet provider.
Peter
also look at: http://discussions.apple.com/thread.jspa?messageID=2599274&#2599274

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i can receive mail but unable to send mail

I'm yet another person who upgraded to Maverick OSX. I'm now thinking, "BIG mistake". Mail was working perfectly. Then, last night, Mail stopped sending.
I've checked everything. Comcast servers are set up correctly. Mail works fine on my ipad, but will not send. It gives me a SMPT error of "Cannot send message using the server comcast.net--authentication rejected" Comcast.net (Offline). I can not get it back online. I've also tried the fixes here, but there is no info.plist by those names in my library!
Anyone have any other ideas how to get this working again? Apple's OS's have been pretty decently stable in the past. I had no thought that the upgrade would be so problematic. Live and Learn.
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HT1277 iPhone 4S. My e-mail service provider is Embarq. I am receiving e-mails, but I cannot send e-mails. I get a message that recipient was rejected by the server because it does not allow relaying. Any suggestions?

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Problem has been solved thanks to a posting by AmberDrivingKendal on 5/15/11. More Like This section was a great help.

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Hello,
What happens when you try send email?
See also:
*[http://mzl.la/1f8x6ld Sending and Receiving Emails]
*[http://mzl.la/1k5DWjq Thunderbird in safe mode]
*[http://mzl.la/1ml3Fmj Using multiple profiles]

TS3276 Am on Business BT Broadband, can receive e-mails but can't send them - any advise?

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Your email service may be blocking access to send emails from a point outside their network. If your email service has a browser interface try connecting to it to send an email.

HT1277 I am able to get my mail but I cannot send.

I have a gmail account and I am able to get my mail on my macbook air but I cannot send mail.

Try re-configuring the SMTP outgoing mail server and password information in your Maill's account settings.

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I have my school e-mail account attached to my iPhone. I can receive e-mails without a problem, but whenever I try to send e-mail to someone outside the .edu server, I receive the error message: "The server rejected one of the recipient's addresses. The message has been placed in your outbox." How can I fix this problem? Thank you for your help!

This indicates the account's SMTP server is not authenticated.
Most, if not all internet service providers block the use of SMTP servers that are outside of the ISP's network or not provided by the ISP being used for your internet connection at the time unless the SMTP server is authenticated. When connected to a cell phone carrier's cellular network for internet access is no exception. Does this occur when connected to the school's wi-fi network in addition when connected to AT&T's cellular network?

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Close Thunderbird. Log onto the web mail page of your ISP and delete the oldest message in the inbox that has not yet been downloaded to Thunderbird. (Or move it to a server folder other than the inbox.) Launch Thunderbird and try again to "Get Mail".
Sometimes a message with a malformed header can block Thunderbird from properly reading and downloading it from the server and that can prevent the download of the other messages in the server inbox.

Can receive e-mail but can't send

This is an Ipad 4, Had an Ipad1before and everything worked good..

iOS: Unable to send or receive email
http://support.apple.com/kb/TS3899
Can’t Send Emails on iPad – Troubleshooting Steps
http://ipadhelp.com/ipad-help/ipad-cant-send-emails-troubleshooting-steps/
Setting up and troubleshooting Mail
http://www.apple.com/support/ipad/assistant/mail/
iPad Mail
http://www.apple.com/support/ipad/mail/
Try this first - Reset the iPad by holding down on the Sleep and Home buttons at the same time for about 10-15 seconds until the Apple Logo appears - ignore the red slider - let go of the buttons. (This is equivalent to rebooting your computer.)
Or this - Delete the account in Mail and then set it up again. Settings->Mail, Contacts, Calendars -> Accounts Tap on the Account, then on the red button that says Remove Account.
 Cheers, Tom

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When I try to reply to emails I consistantly get the message:
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Hey there palmierl,
Welcome to Apple Support Communities.
It sounds like there’s an issue sending and receiving emails from your Gmail account on your iPad. Take a look at the article linked below, the troubleshooting suggestions it provides will likely resolve the issue.
Gmail account cannot get or send email in iOS - Apple Support
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What am I doing wrong? Any ideas?

Hi:
Allan has provided some useful information above - specifically -some ISPs block smtp traffic destined to be routed through a foreign smtp server and not THEIR smtp server. As he said, in mail prefs > accounts > schoolAcc't, just use your ISP's smtp server for outgoing mail. The "from" line, as read by your recipients, will still have show your school email address in it, just as you spevcified it when you created that school mail account in Mail.app. The only place junk about the fact that you are actually using your ISP and not your school's smtp server will be in the message header junk that most people don't normally display anyways.
As far as trying an alternate port (587), I don't know about that -- it would seem to me if your school's IT Dept hasn't set up port 587 as a valid port for smtp services, then that would be like specifying port 8080 in your web browser -- typing "http:www.cnn.com:8080" for example -- it won't play.
At my local university, although they would let you login to their imap server (using SSL over port 993) to download mail, they, the university, would not let you send mail if it was originating from an IP address outside of their campus subnet. So all the directions that they gave on configuring your mail account only applied to setting up a computer on campus, not at home.
What I used to do, is, in Terminal.app, log in to the campus via secure shell, and specify some port forwarding options. Then, I modified that Mail (school)account server information to use those particular ports on 127.0.0.1 (localhost), that secure shell would then forward on to the campus network. It was kind of inconvenient, because you had to launch Terminal, login via secure shell, and then launch mail. The upside, however, was that everything between you and the campus mailserver was encrypted. So, can you log into your school's network using ssh?
The first approach above, as suggested by Allan, would be easiest, although if we're talking laptop and you go onto campus, you might have the same issue then because your ISP might not like mail originating from a "foreign" (school subnet) IP address. So, you'd have to be going into Mail's preferences and switching your smtp server depending on which network you were physically affiliated with -- your ISP at home or your campus LAN at school.
If you're interested in exploring the Terminal.app secure shell thing for your mail, post back, I can tell you how to set that stuff up. Depending on your skill level, it could be considered anywhere from easy to moderately difficult to do.

Able to receive e-mail but unable to send.

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