We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

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

Hierdie gesprek is gesluit en in die argief. Vra asseblief 'n nuwe vraag as jy hulp nodig het.

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

  • 1 antwoord
  • 0 hierdie probleem
  • 14 views
  • Laaste antwoord deur christ1

vanconsumer2
vanconsumer2
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)

christ1
christ1
  • Top 25 Contributor
more options

See https://support.mozilla.org/en-US/questions/1238836