Marco Moock <[email protected]> wrote:

Am 14.10.2022 um 15:01:37 Uhr schrieb Claus Aßmann:

Or you could simply use a smarthost which has multiple MXs.

Please explain this. IIRC smarthost means that all non-local mails
will be send to this specific host (lookup for A/AAAA record). In which
way MX records are involved with the smarthost definition?

Sendmail by default uses MXes first when relaying to the smart host.
Special trick (smart host name in square brackets) is required to turn
off MX lookups.

--
[Andrew] Andrzej A. Filip

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Am Fri, 14 Oct 2022 21:44:24 +0200
schrieb Andrzej Adam Filip <[email protected]>:

Sendmail by default uses MXes first when relaying to the smart host.
Special trick (smart host name in square brackets) is required to turn
off MX lookups.

Ok, so that means if there is an MX record for the hostname of the
smarthost, sendmail will send the mails to the machine named in the MX
record instead of the smarthost?

I've never had such a situation, so it was regardless is I used square
brackets or not, the behaviour at the end was the same.

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Marco Moock <[email protected]> wrote:

Am Fri, 14 Oct 2022 21:44:24 +0200
schrieb Andrzej Adam Filip <[email protected]>:

Sendmail by default uses MXes first when relaying to the smart host.
Special trick (smart host name in square brackets) is required to turn
off MX lookups.

Ok, so that means if there is an MX record for the hostname of the
smarthost, sendmail will send the mails to the machine named in the MX
record instead of the smarthost?

I've never had such a situation, so it was regardless is I used square brackets or not, the behaviour at the end was the same.

Long time ago when c.m.sendmail had been _very_ active questions
"How to turn off MX lookups" were quite frequent.

--
[Andrew] Andrzej A. Filip

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