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Sent e-mail error 530 error number ox800ccc78 port 25.and ox800ccc92 and ox800ccc90 at port 110

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If using Outlook, the problem should get solved by going to your email account settings (Tools > Account Settings > More Settings), and checking the "My outgoing server (SMTP) requires authentication" option.

Then try to send the email.

Hope this helps.

Posted on Dec 12, 2008

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Posted on Jan 02, 2017

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I am using GMAIL with Outlook Express but my outgoing mail does not go out as all my parameters is set properly accordingly


Gmail will no longer accept 'pop' remote access to accounts. You have to logon to the account via your browser and read your mail.

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How can I fix my error 530 problem in outlook?


Your Outlook settings work fine at home, sending/receiving mail. You're on the road now, and you can no longer send, but only receive mails. You're getting an Error 530 or Outlook error 0x800CCC78.

The problem is the on-the-road ISP may be blocking port 25, and/or your ISP might not accept mail being relayed from other network domains. SBC Yahoo allows you to change your SMTP port from 25 to 587. Most ISPs let port 587 flow through. Internet access works, receiving email works, you just can no longer send.

Solution:

  • Go to Outlook, Tools, Accounts, Server, Advanced, and change the SMTP port from 25 to 587. Hit Apply, OK, then exit/restart Outlook.
  • Start Outlook, create a test email and send it. Should work fine.
  • The solution might vary with other ISPs. Your home ISP must support an alternate port for SMTP TCP traffic, and the current ISP providing you access must not block that alternative port.
  • Recognize this is all the fault of spammers and the ISPs trying to slow them down. This is why they block port 25 for non-customers.

If this doesn't work, just change the port back to port 25.
Alternatively, as with SBC Yahoo mail, you can always use the Webmail interface. This, like all other web pages, uses port 80, which ISPs do not block.

Jul 06, 2011 | Computers & Internet

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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.

Feb 05, 2011 | Outdoor Concepts OCI AD20 27 Stainless...

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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 'Teresa.Smid@xxx. Subject 'Re: Away Dec. 27th-Mar. 9th', Account:...


Hello,

Might be you will have to contact your internet service provider or a admin if using in office environment.
The most common cause of this error is a restrictive (ISP) internet service provider. The ISP you're using won't allow you to use the Outgoing Mail Server (SMTP) that your email software
designates. They do this to reduce or prevent abuse; they don't want junk mailers going through their network
with masses of junk email.

Try turning off the firewall of your anti virus and operating system as well.
Thanks

Dec 25, 2009 | Toshiba Satellite 4090XDVD Notebook

1 Answer

Outlook express


0x800CCC78 SMTP_REJECTED_SENDER Unknown sender. This is caused by having the incorrect e-mail address in the Reply-To field.

You may have to authenticate in outlook express by putting in the SMTP server name of your internet provider instead of yahoo
for example
Incoming = smtp.mail.yahoo.com
Outgoing = smtp.yourISPservername
Some isp's will not let you send out with a different smtp server than theirs.
It's why you can receive but not send.

Sep 15, 2009 | E-Machines eMachines Desktop PC

3 Answers

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


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

Jan 15, 2009 | Computers & Internet

1 Answer

Sending e-mail


Well, did you try going to the help website given? That would be extremely wise. ^-^ I went and it seems to answer many questions.

Jun 10, 2008 | Microsoft Office Outlook 2003 for PC

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