Thunderbird download guard the same messages, even after deletion from the trash folder

Also get this message when one of my emailing groups "is not an e-mail address invalid because it is not the form user@host.» You need to fix it before you send the e-mail. »

Hello, could you please provide the following information?

  • Is what type of mail account (IMAP or POP)?
  • Who is the provider of e-mail (GMail and other webmail), self-hosted?

Please consider creating a new thread on the question by e-mail groups. One thread per question easier to answer, read and search for them.

This will allow also the volunteers of Mozilla to offer solutions that are more useful to you. This can help to solve your problem more quickly and more effectively.

Thank you!

Tags: Thunderbird

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