🚀 go-pugleaf

I run a few mid-sized mailing lists, that is, population in the ~200
range.  There's a number of list recipients for whom mail gets from
here to there via a Certain Well-Known Vendor.  Every 10 days or 2
weeks or thereabouts, the mailer and/or nameserver configuration at
this Vendor goes all to hell, and I start getting large numbers of
bounces aimed back at myself (as the "-request" address).  Now,
usually, when I get this sort of thing, and it's clear that it's a
local problem at the intermediate site, I just forward such stuff to
postmaster@that.site.  But this one Vendor postmaster's inability to
maintain a functioning mailer on a consistent basis is really
beginning to irritate me.  This has been going on for quite some
months now.

This Vendor is also the MX host for a Well-Known Network Services
Company, connected to the Vendor via UUCP.  If I were the Net Svc
Company, I'd be pretty @#$% irritated that my customers' mail was so
frequently trashed, but it's possible (if unlikely) that the Net Svc
Company isn't even aware of the problem.

Any suggestions on how to deal with this sort of situation?  My
forwardings to postmaster@Ven.dor have gotten alternately flammable
and sarcastic, but nothing has helped so far.  I could publicize
names, I suppose, but I'd really rather not do that; I just want the
mail to move more consistently.  No vendettas are on my mind.

--karl