On 6/24/24 16:42, Jim Dory wrote:

550 5.4.1 Recipient address rejected: Access denied

This one could be because the recipient server doesn't like the new server IP.

We kept the same IP address, but the hostname of the domain did change. I just moved to a different server in the same hosting company.

That shouldn't cause a 550/5.1.4, but check where your new server is sending to (vs. old), port in particular: recipient server can have different ACLs on 25, 465, and 587.

Dima

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