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!

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

A client IT person states my server is blocking email messge because settings are tagging their marketing signature as "untrusted" , how do I fix?

  • 5 replies
  • 1 has this problem
  • 6 views
  • Last reply by christ1

more options

Client cannot send me emails they are being bounced back stating undeliverabe

Client cannot send me emails they are being bounced back stating undeliverabe

Chosen solution

If the error comes from the sender's provider server, the sender needs to contact the provider (or IT folks). If the error comes from your server, then you need to check your server set up.

In any case, this has got nothing to do with Thunderbird. The message is coming from a server in between, not Thunderbird.

Read this answer in context 👍 0

All Replies (5)

more options

What is the exact error message?

more options

The entire error message please.

more options

554 5.7.1 The message from (<removed for privacy>) with the subject of (FW: BGC PRICING Fwd: Transmittal 5750007 CN# 62378 93 Ruston) matches a profile the Internet community may consider spam. Please revise your message before resending.

more options

Chosen Solution

If the error comes from the sender's provider server, the sender needs to contact the provider (or IT folks). If the error comes from your server, then you need to check your server set up.

In any case, this has got nothing to do with Thunderbird. The message is coming from a server in between, not Thunderbird.