We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

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

This thread was archived. Please ask a new question if you need help.

Thunderbird unable to access Optonline mail sever after latest update

  • 1 reply
  • 0 have this problem
  • 1 view
  • Last reply by bduty2

bduty2
bduty2
more options

Immediately after the latest Thunderbird update, I was unable to access the Optonline mail server. I get an error message "Sending of username did not succeed. Mail server mail.optonline.net responded: AUTH CRAM-MD5 not supported." I made no changes to Thunderbird since the last time it was working.

Immediately after the latest Thunderbird update, I was unable to access the Optonline mail server. I get an error message "Sending of username did not succeed. Mail server mail.optonline.net responded: AUTH CRAM-MD5 not supported." I made no changes to Thunderbird since the last time it was working.

All Replies (1)

bduty2
bduty2 Question owner
more options

This was fixed by using the following: Recommended POP server mail.optimum.net on 995, SSL/TLS, authentication = normal password