[Mailman-Users] Undelivered Mail Returned to Sender

Stephen J. Turnbull turnbull.stephen.fw at u.tsukuba.ac.jp
Wed Aug 8 04:11:28 EDT 2018

John Levine writes:

 > In article <20180804141855.7510026C1F29 at sharky3.deepsoft.com> you write:
 > >-=-=-=-=-=-
 > >
 > >Do you have access to your inbound mail server? If so, you need to
 > >arrange for that server to *reject* all mail connections from
 > >qq.com. qq.com is a *notorious* source of spam (there are no
 > >legitimate E-Mail addresses @qq.com).  You might also want to
 > >firewall Chinese IP addresses as well.
 > Actually, there are millions of legitimate e-mail addrsses at qq.com.
 > It's Tencent, the giant Chinese company that owns Wechat, which has
 > 900 million active users, all with an e-mail address linked to their
 > Wechat accounts.
 > Nearly all of the users are in China, so if you don't expect anyone
 > from China to subscribe to your lists, I suppose you can block them.

Thanks John!  Saved me the trouble.

Also, if Postfix REJECT is what Mailman thinks of as "reject" (return
to sender), it's preferable to (silently) DISCARD on the off chance
that the address was spoofed or hijacked.


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