I've seen it work but frankly, I don't bother with it anymore. No MX for
sender or recipient, I don't send it. This rspamd module right here:
https://rspamd.com/doc/modules/mx_check.html
While it works, I can't recall the last time someone's mail server
matched their A record while they desired to receive mail without MX
records. It's a pretty specific scenario.
On 2022-06-20 13:54, ml+mailop--- via mailop wrote:
On Mon, Jun 20, 2022, Grant Taylor via mailop wrote:
When was the last time that anyone has seen the fall back to A record
work?
Which broken software has this bug? (an obvious RFC violation --
an "MTA" of one of those companies who don't care about RFCs anyway?)
It works fine in the MTAs that I maintain, and I'm sure it works
in postfix etc too.
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