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.

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

Cannot send E-mails, error 5.7.1 Message contains spam or virus or sender is blocked

  • 1 svar
  • 1 har dette problemet
  • 1 view
  • Siste svar av christ1

more options

It happened overnight. I manage two e-mail accounts on Thunderbird. My secondary one is still working okay. However, my primary e-mail has started to get this message since today morning when I tried to send e-mails.

The mail server responded: 5.7.1 Message contains spam or virus or sender is blocked : chair64_6c05aac9dfd4f. Please check the message and try again.

I used Chrome instead of Thunderbird to send e-mail using my primary account and it sent out fine. Something in Thunderbird is block my e-mail through this account. I attempted to send an empty e-mail and it did not go through as well. So I think my email is blocked for some reason. How can I get more information on this? Thank you for your help

It happened overnight. I manage two e-mail accounts on Thunderbird. My secondary one is still working okay. However, my primary e-mail has started to get this message since today morning when I tried to send e-mails. The mail server responded: 5.7.1 Message contains spam or virus or sender is blocked : chair64_6c05aac9dfd4f. Please check the message and try again. I used Chrome instead of Thunderbird to send e-mail using my primary account and it sent out fine. Something in Thunderbird is block my e-mail through this account. I attempted to send an empty e-mail and it did not go through as well. So I think my email is blocked for some reason. How can I get more information on this? Thank you for your help

All Replies (1)

more options

You should talk to your email provider. The may have blocked your IP.