Hi all,
I'm looking for best practices for managing distribution groups. I'm
wanting to avoid my emails being blocked or delayed as SPAM. Sorry to
ask such an open question.
At work I manage a number of groups with maybe 3 thousand members each
without any problems.
I've put the same setup on my personal VPS server and have a group of
only about 150 members. However, I have a lot of problems delivering
emails to the group.
Many of the members are on Yahoo and Gmail. Both services are constantly
sending me temp errors such as
host mx-eu.mail.am0.yahoodns.net [188.125.72.74]
Delay reason: SMTP error from remote mail server after end of data:
421 [IPTS04] Messages from x.x.x.x temporarily deferred due to
unexpected volume or user complaints - 4.16.55.1; see
https://postmaster.verizonmedia.com/error-codes
As I'm only emailing members who asked to join the group I doubt that
they have had complaints so it must be down to the high volume.
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