4.4.1 No answer from host

The system could not connect to the recipient’s mail server, or it did not answer in time.

4.4.1 No answer from host

Temporary: it may work if you retry

The system could not connect to the recipient’s mail server, or it did not answer in time.

Usual causes

The recipient’s mail server is down or unreachable.
A network problem between the two.

What to do

Retry later. It usually clears when the server is back.
If it lasts for days, the recipient’s domain may have a problem, and you may need to contact them another way.

Usually the fault of: receiving server.

Common questions.

What does 4.4.1 mean?

The system could not connect to the recipient’s mail server, or it did not answer in time.

Will retrying fix 4.4.1?

Often yes. It is a temporary failure, and mail systems retry for you. If it keeps failing for days, look at the causes listed above.

How do I fix 4.4.1?

Retry later. It usually clears when the server is back. If it lasts for days, the recipient’s domain may have a problem, and you may need to contact them another way.

Other codes: 5.1.1 · 5.1.2 · 5.1.3 · 5.1.6 · 5.2.1 · 5.2.2 · 5.2.3 · 5.3.4 · Decode a whole bounce message

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