Thanks, Martin. Yes, this seems to be a problem. Many places seem to be OK with just looking up `sift.net`, but cl.net is one of a handful that won't accept that and need the mail address to line up exactly with `mail.sift.net`.
I've reported this to our sysadmins and they are trying to figure out a solution.
On 22 Jul 2020, at 5:44, Martin Simmons wrote:
On Wed, 15 Jul 2020 11:22:51 -0500, Robert Goldman said:
By the way, this is not my normal email, but emails from my work address (rpgoldman@sift.net) are being bounced because of the reverse lookup policy on common-lisp.net.
It seems to be puking on this:
Your IP address 50.249.120.161 is associated with the domain sift.net. Nevertheless your message appears to be sent from mail.sift.net.
I think SIFT has misconfigured reverse DNS:
# host -t a mail.sift.net. mail.sift.net has address 50.249.120.161 # host -t a 50.249.120.161 161.120.249.50.in-addr.arpa domain name pointer sift.net. # host -t a sift.net. sift.net has address 50.249.120.162
The reverse DNS for 50.249.120.161 should be mail.sift.net. for best practice (see https://www.debouncer.com/reverse-dns-check?ip=50.249.120.161).
__Martin