Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

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

how to fix error: checking mail server capabilities

  • 3 replies
  • 4 have this problem
  • 2 views
  • Last reply by christ1

more options

using windows 10 with thunderbird as the default email client. Opened computer this morning and there were no new messages (usually 20-25 overnight). Clicked on Get Mail and message at the bottom of the page was: Checking mail server capabilities. Rebooted computer, same message. Restarted Thunderbird with no add-ins active. Same error message.  ???

using windows 10 with thunderbird as the default email client. Opened computer this morning and there were no new messages (usually 20-25 overnight). Clicked on Get Mail and message at the bottom of the page was: Checking mail server capabilities. Rebooted computer, same message. Restarted Thunderbird with no add-ins active. Same error message. ???

All Replies (3)

more options

Talk to your email provider, they may have a problem.

more options

I can access my email through webmail on my ISP's server without any problem. Can't see why Thunderbird has a problem connecting as well.

more options

Webmail infrastructure is independent from POP/IMAP/SMTP servers. Therefore, if webmail works, this is no indication that there are no other problems.