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

ค้นหาฝ่ายสนับสนุน

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.

เรียนรู้เพิ่มเติม

หัวข้อนี้ถูกเก็บถาวรแล้ว โปรดถามคำถามใหม่หากคุณต้องการความช่วยเหลือ

Error sending mails following update to 78.4.0.

  • 1 การตอบกลับ
  • 1 คนมีปัญหานี้
  • 1 ครั้งที่ดู
  • ตอบกลับล่าสุดโดย Mark-E-H

Mark-E-H
Mark-E-H
more options

This morning Thunderbird was updated to 78.4.0. Incoming mails (POP3) work fine. But suddenly outgoing mails are rejected: "An error occurred while sending mail. The mail server responded 450 4.1.8 <my email>: Sender address rejected: Domain not found. Please check the message recipient ".... recipient ..." and try again.

Sending mails worked fine till update was installed, and I have not changed any SMTP settings. Same error for all recipients of mail.

Any suggestions?

This morning Thunderbird was updated to 78.4.0. Incoming mails (POP3) work fine. But suddenly outgoing mails are rejected: "An error occurred while sending mail. The mail server responded 450 4.1.8 <my email>: Sender address rejected: Domain not found. Please check the message recipient ".... recipient ..." and try again. Sending mails worked fine till update was installed, and I have not changed any SMTP settings. Same error for all recipients of mail. Any suggestions?

วิธีแก้ปัญหาที่เลือก

Turned out to be a problem with the provider. Problem is solved.

อ่านคำตอบนี้ในบริบท 👍 0

การตอบกลับทั้งหมด (1)

Mark-E-H
Mark-E-H เจ้าของคำถาม
more options

วิธีแก้ปัญหาที่เลือก

Turned out to be a problem with the provider. Problem is solved.