5.1.2 Bad destination system address

The domain in the address does not exist, or cannot receive mail.

5.1.2 Bad destination system address

Permanent: retrying will not help

The domain in the address does not exist, or cannot receive mail.

Usual causes

A typo in the domain.
A domain that has expired or never existed.
A domain with no mail server records (MX).

What to do

Correct the domain if it is a typo.
Remove the address if the domain is gone.

Usually the fault of: recipient.

Common questions.

What does 5.1.2 mean?

The domain in the address does not exist, or cannot receive mail.

Will retrying fix 5.1.2?

No. It is a permanent failure, so retrying the same message will not help, and repeated attempts can hurt your sending reputation. Fix the cause first.

How do I fix 5.1.2?

Correct the domain if it is a typo. Remove the address if the domain is gone.

Other codes: 5.1.1 · 5.1.3 · 5.1.6 · 5.2.1 · 5.2.2 · 5.2.3 · 5.3.4 · 5.4.1 · Decode a whole bounce message

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