Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Wo archive tread sia. Meɖekuku bia biabia yeye ne ehia kpeɖeŋu.

I am getting this message when trying to log in: Sending of username did not succeed. Mail server mail.comcast.net responded: Plaintext authentication disallow

  • 2 ŋuɖoɖowo
  • 1 masɔmasɔ sia le esi
  • 83 views
  • Nuɖoɖo mlɔetɔ Pauldt

Pauldt
Pauldt
more options

I attempted to log in this morning and the system prompted me to enter my Comcast email account password. I am positive I am entering it in correctly. Then, this message pops up:

Sending of username did not succeed. Mail server mail.comcast.net responded: Plaintext authentication disallowed on non-secure (SSL/TLS) connections.

How do I resolve this?

I attempted to log in this morning and the system prompted me to enter my Comcast email account password. I am positive I am entering it in correctly. Then, this message pops up: Sending of username did not succeed. Mail server mail.comcast.net responded: Plaintext authentication disallowed on non-secure (SSL/TLS) connections. How do I resolve this?

Ŋuɖoɖo si wotia

I contacted Comcast directly and found the solution. They recently changed their settings. To correct the problem, go to Thunderbird's Server Settings and change the Port from 110 to 995. Change the Security Settings on the Connection Security to SSL/TLS. Problem solved.

Xle ŋuɖoɖo sia le goya me 👍 1

All Replies (2)

Toad-Hall
Toad-Hall
  • Top 25 Contributor
more options

In Thunderbird

  • Help > Troubleshooting Information
  • click on 'copy text to clipboard' button
  • In this forum question, right click in a 'post a Reply' text box and select 'Paste'.
  • You can remove all info on fonts and printers, but do not edit anything else.
Pauldt
Pauldt Biabia la
more options

Ɖɔɖɔɖo si wotia

I contacted Comcast directly and found the solution. They recently changed their settings. To correct the problem, go to Thunderbird's Server Settings and change the Port from 110 to 995. Change the Security Settings on the Connection Security to SSL/TLS. Problem solved.