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Old 21 Mar 2018, 07:41 PM   #1
Join Date: Sep 2014
Posts: 52
got this message when trying to send to a certain address

Apparently some antispam program doesn't like how fastmail sends email? I don't know much about it so I thought I'd ask here. I got this message when trying to send.

The mail system

<[email protected]>: host[] said:
550 Sender ( has no A, AAAA, or MX DNS records. (in reply to
RCPT TO command)

why does this happen? its the only time i've ran into it.
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