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Can't send e-mail

  • 1 reply
  • 1 has this problem
  • 10 views
  • Last reply by sfhowes

jenshayco3
jenshayco3
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I am able to send one or two e-mails a day until I receive the error message:

An error occurred while sending mail: The mail server sent an incorrect greeting: resomta-po-19v.sys.comcast.net resomta-po-19v.sys.comcast.net Excessive failed authentication, ESMTP server temporarily not available.

I can send and receive directly from Comcast (which is cumbersome) but not with Thunderbird. I have reset my password several times. Win 10, Thunderbird 78.6.0, Norton Antivirus (disabled), Below are my SMTP settings.

This is really driving me crazy and I need to fix it but no idea what to do.

Jen

I am able to send one or two e-mails a day until I receive the error message: An error occurred while sending mail: The mail server sent an incorrect greeting: resomta-po-19v.sys.comcast.net resomta-po-19v.sys.comcast.net Excessive failed authentication, ESMTP server temporarily not available. I can send and receive directly from Comcast (which is cumbersome) but not with Thunderbird. I have reset my password several times. Win 10, Thunderbird 78.6.0, Norton Antivirus (disabled), Below are my SMTP settings. This is really driving me crazy and I need to fix it but no idea what to do. Jen
Attached screenshots

All Replies (1)

sfhowes
sfhowes
  • Top 10 Contributor
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In the User Name field, omit the @comcast.net part.

https://support.mozilla.org/en-US/questions/1320016#answer-1380031