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.

i use Thunderbird via Plusnet who host my domain name. All emails to gmail are returned.

  • 3 replies
  • 2 have this problem
  • 20 views
  • Last reply by david

david719
david719
more options

i use Thunderbird via Plusnet who host my domain name. All emails to gmail are returned.

i use Thunderbird via Plusnet who host my domain name. All emails to gmail are returned.

All Replies (3)

david
david
  • Top 10 Contributor
more options

Is there an error message?

david719
david719 Question owner
more options

This was the message I got -- I've just deleted the addressee's name:

Reporting-MTA: dns; avasout-peh-002 [212.159.14.18] Received-From-MTA: dns; [192.168.1.67] [146.199.87.140] Arrival-Date: Wed, 14 Jun 2023 10:30:09 +0100


Final-recipient: rfc822; ***@gmail.com Diagnostic-Code: smtp; 550-5.7.26 This mail is unauthenticated, which poses a security risk to the

Last-attempt-Date: Wed, 14 Jun 2023 10:30:09 +0100

david
david
  • Top 10 Contributor
more options

Gmail has tightened security recently and giving you a code 550. There are various possibilities, such as sending from an SMTP server with account xxx but the email return address is yyy. I cannot say what is causing your error, but it's worth review. Check your smtp settings and authentication.