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e-mail error 0x800CCC78

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New Poster

Re: e-mail error 0x800CCC78

steve-baker, thanks you're correct:

Under "Servers" tab (2nd one), the last box under, " Outgoing Mail Server"  - check "My server requires authentication"  I click the "settings" button and then I click on "Use same settings as my incoming mail server" and it worked!

 

Thank you again!

Bronze Problem Solver

Re: e-mail error 0x800CCC78

 


Again wrote:

 


CCCarole wrote:

 


jmhighrr wrote:

I cannot send out e-mails today.  The server rejects sender's e-mail address, Server Response: '550 5.10 Authentication required', Server Error: 550, Error Number: 0x800CCC78.

 

What happened?  How can I send e-mails?


What are you using for email?  Please check the email client recommended settings against those in this clickable link

 


0x800CCC78

 

The message could not be sent because the server rejected the sender's e-mail address. The sender's e-mail address was 'email_address@someISP.net'. Subject 'subject_line', Account: 'mail.comcast.net', Server: 'smtp.comcast.net', Protocol: SMTP, Server Response: '530 Authentication required', Port: 25, Secure(SSL): No, Server Error: 530, Error Number: 0x800CCC78

You are either connected to the internet through a different ISP or your Comcast IP address is not currently being recognized by the Comcast SMTP server. The system should correct this issue automatically or you can enable outgoing email authentication. This setting can remain enabled if you are on the Comcast network and you will experience no adverse effects with your email.

 


It's extremely unlikely that that's the problem, although enabling authentiction will fix the OP's problem. Their problem is almost certainly that they're using ports 587 or 465, which require authentication. To the OP, enable "my server requires authentication" or something like that, not Secure Password Authentication.

 

Highlighted
Expert

Re: e-mail error 0x800CCC78

 


CCCarole wrote:

 


jmhighrr wrote:

I cannot send out e-mails today.  The server rejects sender's e-mail address, Server Response: '550 5.10 Authentication required', Server Error: 550, Error Number: 0x800CCC78.

 

What happened?  How can I send e-mails?


What are you using for email?  Please check the email client recommended settings against those in this clickable link

 


0x800CCC78

 

The message could not be sent because the server rejected the sender's e-mail address. The sender's e-mail address was 'email_address@someISP.net'. Subject 'subject_line', Account: 'mail.comcast.net', Server: 'smtp.comcast.net', Protocol: SMTP, Server Response: '530 Authentication required', Port: 25, Secure(SSL): No, Server Error: 530, Error Number: 0x800CCC78

You are either connected to the internet through a different ISP or your Comcast IP address is not currently being recognized by the Comcast SMTP server. The system should correct this issue automatically or you can enable outgoing email authentication. This setting can remain enabled if you are on the Comcast network and you will experience no adverse effects with your email.

 



I am not a Comcast employee; I am just a customer, volunteering my time to help other customers here in the Forums.

If you'd like information about the Expert program, you can find it here.
Gold Problem Solver

Re: e-mail error 0x800CCC78

 


jmhighrr wrote:

I cannot send out e-mails today.  The server rejects sender's e-mail address, Server Response: '550 5.10 Authentication required', Server Error: 550, Error Number: 0x800CCC78.

 

What happened?  How can I send e-mails?


What are you using for email?  Please check the email client recommended settings against those in this clickable link

 



Need Email Help? Please post the following information in your post.
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Details of the problem you are having.




New Poster

e-mail error 0x800CCC78

I cannot send out e-mails today.  The server rejects sender's e-mail address, Server Response: '550 5.10 Authentication required', Server Error: 550, Error Number: 0x800CCC78.

 

What happended?  How can I send e-mails?