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Contributor
Posts: 8
Registered: ‎07-28-2006

Can receive but not send email via OE 6

Sending email fails starting 3/30. Error message is:

"The message could not be sent because the server rejected the sender's e-mail address. The sender's e-mail address was '[my user name]@comcast.net'. Subject 'Emailing: chartbundle2.pdf', Account: 'mail.comcast.net', Server: 'smtp.comcast.net', Protocol: SMTP, Server Response: '550 5.1.0 Authentication required', Port: 587, Secure(SSL): No, Server Error: 550, Error Number: 0x800CCC78"

Comcast online support (the utility that checks all connections) found no problem. No, there is a problem.

Email Expert
JR071702
Posts: 6,888
Registered: ‎03-10-2004

Re: Can receive but not send email via OE 6

 


OldCranky wrote:

Sending email fails starting 3/30. Error message is:

"The message could not be sent because the server rejected the sender's e-mail address. The sender's e-mail address was '[my user name]@comcast.net'. Subject 'Emailing: chartbundle2.pdf', Account: 'mail.comcast.net', Server: 'smtp.comcast.net', Protocol: SMTP, Server Response: '550 5.1.0 Authentication required', Port: 587, Secure(SSL): No, Server Error: 550, Error Number: 0x800CCC78"

Comcast online support (the utility that checks all connections) found no problem. No, there is a problem.


 

 


Q1: How do I setup Outlook, Outlook Express and Windows Mail?

 

JR

Email Expert
CCCarole
Posts: 28,261
Registered: ‎05-21-2006

Re: Can receive but not send email via OE 6

 


OldCranky wrote:

Sending email fails starting 3/30. Error message is:

"The message could not be sent because the server rejected the sender's e-mail address. The sender's e-mail address was '[my user name]@comcast.net'. Subject 'Emailing: chartbundle2.pdf', Account: 'mail.comcast.net', Server: 'smtp.comcast.net', Protocol: SMTP, Server Response: '550 5.1.0 Authentication required', Port: 587, Secure(SSL): No, Server Error: 550, Error Number: 0x800CCC78"

Comcast online support (the utility that checks all connections) found no problem. No, there is a problem.


 

 

I would check your settings againest those in this clickable link.  I use OE, but I use port 465 with SSL on.

you would find the port settings here: Tools>Accounts>Mail tab> Properties> and then tick on the Advanced tab.



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Bronze Problem Solver
Posts: 3,126
Registered: ‎05-12-2006

Re: Can receive but not send email via OE 6

 


OldCranky wrote:

Sending email fails starting 3/30. Error message is:

"The message could not be sent because the server rejected the sender's e-mail address. The sender's e-mail address was '[my user name]@comcast.net'. Subject 'Emailing: chartbundle2.pdf', Account: 'mail.comcast.net', Server: 'smtp.comcast.net', Protocol: SMTP, Server Response: '550 5.1.0 Authentication required', Port: 587, Secure(SSL): No, Server Error: 550, Error Number: 0x800CCC78"

Comcast online support (the utility that checks all connections) found no problem. No, there is a problem.


 

You need to enable authentication on port 587. Check the box that says something like "My server requires authentication" in the SMTP setup.

 

Contributor
Posts: 8
Registered: ‎07-28-2006

Re: Can receive but not send email via OE 6

thanks for the tip. I let the outgoing server roll back to the default 25 from 587 and it worked.

Contributor
Posts: 8
Registered: ‎07-28-2006

Re: Can receive but not send email via OE 6

And I checked that authentication thingy. Thanks also

Mac Expert
Joel
Posts: 5,829
Registered: ‎12-01-2003

Re: Can receive but not send email via OE 6

Port 25 may work now, but it may also stop working at any time without warning. Comcast's default (recommended) SMTP server settings are Port 587 with authentication. Encryption (SSL/TLS) is also highly recommended. Port 465 will also work. SSL is required on this port, as is SSL encryption.