John Levine wrote:
Their POP and IMAP servers have thousands of different names, one for
each hosting customer.
They've already got the thousands of different names. Adding a second
to the DNS provisioning mechanism won't be that hard. And it allows for
having per-customer selections.
Alternately, or perhaps as a fallback, you could chain it. Eg: Take the
IP of your server (which you have to do already), get the PTR, prepend
"_report", and do your configuration lookup on _that_ name (SRV or TXT).
I still think it a more general solution than hacking the MTA/MDA.
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