Windows Thunderbird emails Rejected by Gmail
Dear Sir/Madam, Several of my emails in Windows Thunderbird keep getting rejected when sent to gmail addresses. Please see below the message that I receive :-
This is the mail system at host smtp1-g21.free.fr.
I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below.
For further assistance, please send mail to postmaster.
If you do so, please include this problem report. You can delete your own text from the attached returned message.
The mail system
<miranda.pickersgill@gmail.com>: host gmail-smtp-in.l.google.com[108.177.15.26]
said: 550-5.7.26 This message does not have authentication information or fails to 550-5.7.26 pass authentication checks (SPF or DKIM). To best protect our users 550-5.7.26 from spam, the message has been blocked. Please visit 550-5.7.26 https://support.google.com/mail/answer/81126#authentication for more 550 5.7.26 information. f12-20020a5d64cc000000b0021da4bb99ffsi2680344wri.77 - gsmtp (in reply to end of DATA command)
Reporting-MTA: dns; smtp1-g21.free.fr
X-Postfix-Queue-ID: 62BB7B004EC
X-Postfix-Sender: rfc822; candj.maxwell@aliceadsl.fr
Arrival-Date: Sun, 10 Jul 2022 20:39:36 +0200 (CEST)
Final-Recipient: rfc822; miranda.pickersgill@gmail.com Original-Recipient: rfc822;miranda.pickersgill@gmail.com Action: failed Status: 5.7.26 Remote-MTA: dns; gmail-smtp-in.l.google.com Diagnostic-Code: smtp; 550-5.7.26 This message does not have authentication
information or fails to 550-5.7.26 pass authentication checks (SPF or DKIM). To best protect our users 550-5.7.26 from spam, the message has been blocked. Please visit 550-5.7.26 https://support.google.com/mail/answer/81126#authentication for more 550 5.7.26 information. f12-20020a5d64cc000000b0021da4bb99ffsi2680344wri.77 - gsmtp
I would appreciate it if someone could advise how this problem can be rectified please. Thank you.