Please also add the result of these troubleshooting steps to your post

• Does Thunderbird work in TB Safe mode (see Thunderbird Safe Mode)?
• Do you use anti-virus and firewall software? What is the version?
• Who is the email provider?
• Is the mail account IMAP or POP?
• Who is the internet provider?

Please post back with this information and any other questions you might have.

This was an issue for a few weeks up to a day after posting the question in this forum. Full functionality has returned. To the best of my knowledge there were no updates to Windows or Tbird. I don't know if there were any updates to McAfee.

McAfee Total Protection 14.0 R10 and associated applications. Gmail is the primary email provider, but I also have an account at agentsphere.net. Both had the same issue Both are POP accounts in Tbird This has been an issue with Comcast (current) and Fairpoint DSL (most of the year.

If this means the issue is closed, so be it. But if there is a clue as to what was going on, I'd sure like to know.

Thansk

Oh I think McAfee will have been the cause. We have a long rocky relationship with them. The are currently the No. 6 crash causer for Thunderbird.

See the link for some of the issues McAfee have caused. https://wiki.mozilla.org/Thunderbird:Testing:Antivirus_Related_Performance_Issues#McAfee