Barracuda

1

Barracuda returned a temporary failure, often quoting a downstream bounce. Fix the issue for the quoted recipient before sending that group again.

1

Barracuda returned a temporary failure, often quoting a downstream bounce. Fix the issue for the quoted recipient before sending that group again.

1

The recipient's Barracuda filter license is expired, so mail cannot be accepted. They need to renew with Barracuda before delivery will work.

4.7.1

Barracuda rejected this recipient under an abuse policy. Contact the recipient another way. Only their admin can lift the block.

4.7.1

Barracuda greylisted this recipient for a few minutes. Retry shortly. Delivery usually succeeds on the next attempt.

4.7.1-2

Barracuda asked you to try again later. Retry with backoff.

4.4.3

Barracuda hit a temporary server error. Retry with backoff.

1

Barracuda says this user is unknown. Treat it as a hard bounce and remove the address.

2

Barracuda says there is no such user. Treat it as a hard bounce and remove the address.

3

Barracuda blocked delivery because the mailbox was unavailable or rejected by policy. Verify the address. Ask the recipient admin if it should be allowed.

4

Barracuda thinks this message spoofs a known brand. Check From details, domains, and links for unintended brand signals, then resend a cleaner copy.

5

Barracuda permanently failed this recipient as blocked for content or domain reasons. A different message may still deliver later.

1

Barracuda rejected a URL in the content as spam. Check every link and domain against block lists, then resend without the bad URL.

2

Barracuda rejected banned content. Clean phrasing and links, then resend a safer version of the message.