[courier-users] mailx.courier-mta.org checking HELO against DNS?

mailx.courier-mta.com[216.254.115.190] just told me that:

> 517 HELO someservername2.domain.de does not match
> ::ffff:123.123.12.12 (in reply to MAIL FROM command)

actually the dns-entry for that address is someservername2-1.domain.de

this lokks like the HELO name is compared to the DNS entry.
(instead of the (reverse-)DNS lookups mentioned in
http://www.courier-mta.org/FAQ.html#esmtptimeout .)

i use my provider's smtp as smarthost and complained, but they told me
that this check SHOULD NOT be done according to the RFCs. (they did not
say which RFC they refer to.)

i guess they are right, otherwise they would have been flooded with
complaints.

n.

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