This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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.

The return mail address was invalid

  • 1 reply
  • 1 has this problem
  • 1 view
  • Last reply by sfhowes

BDS1959
BDS1959
more options

I have a user that has three separate email accounts in Thunderbird. The one account cannot send email - gets the message in the attachment. Any ideas? F.Y.I., it's a gmail account. But all three are gmail.

Thanks!

I have a user that has three separate email accounts in Thunderbird. The one account cannot send email - gets the message in the attachment. Any ideas? F.Y.I., it's a gmail account. But all three are gmail. Thanks!
Attached screenshots

All Replies (1)

sfhowes
sfhowes
  • Top 10 Contributor
more options

Open Tools/Account Settings, select the problem account in the left pane, and look at the Outgoing Server (SMTP) entry in the right pane. Does it point to a server that is defined for a different Gmail account?