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Message could not be sent. Server rejected sender's email address

This occured repeatedly since I started using Att connection. I spent days to fix it. I removed and added account, but it's not helping.

The message could not be sent because the server rejected the sender's e-mail address. The sender's e-mail address was 'reshet2000@att.net'. Subject 'The Little Red Hen', Account: 'pop.att.yahoo.com', Server: 'smtp.att.yahoo.com', Protocol: SMTP, Server Response: '530 authentication required - for help go to http://help.yahoo.com/help/us/sbc/dsl/mail/pop/pop-11.html', Port: 25, Secure(SSL): No, Server Error: 530, Error Number: 0x800CCC78

Your server has unexpectedly terminated the connection. Possible causes for this include server problems, network problems, or a long period of inactivity. Account: 'pop.att.yahoo.com', Server: 'smtp.att.yahoo.com', Protocol: SMTP, Port: 25, Secure(SSL): No, Error Number: 0x800CCC0F

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  • hosko Apr 02, 2009

    TRying to contact someone on Craig's list and when e-mail through contact e-mail keep getting server error 530.

  • Prasanna Udayasiri Aug 10, 2013

    Authenticating on server... Authentication stage error: Error: Server returned unrecognized reply

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The message could not be sent because it rejected as the sender

Posted on Aug 18, 2010

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Authenticating on server...
Authentication stage error: Error: Server returned unrecognized reply

Posted on Aug 10, 2013

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The message could not be sent because the server rejected the sender's e-mail address. The sender's e-mail address was 'fkb@ameritech.net'. Subject '', Account: 'pop.attyahoo.com', Server:...


One problem is that the incoming (POP) mail server shown in the error message appears to be incorrect. The server address should be "pop.att.yahoo.com" (with a period between "att" and "yahoo"). The incorrect mail server address may interfere with authentication of the sender's email address, which is needed before the outgoing message is sent.

The "530 authentication" message indicates your outgoing (SMTP) server likely requires "server authentication". Also, the "Port 25" message indicates your email program is currently trying to send via Port 25, with no SSL; but Ameritech/Yahoo accounts appears to use Port 465 with SSL enabled.

See more on sever settings for "ameritech.net" users:
http://www.dslreports.com/faq/5535
https://motorola-global-portal.custhelp.com/app/answers/detail/a_id/61941/~/i886---at%26t,-bellsouth,-sbcglobal,-ameritech-email-settings

I would suggest you check the settings for your Ameritech email account in your email program. You may need to correct several settings. The steps to access account settings are somewhat different for various email programs (Outlook, Windows Live Mail, Thunderbird, etc.). You should be able to find guidance in the "help" section of your email program.

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E-mail error cation


check your whitelist, the address your sending has been put to spam and blocked you from sending email.

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