On a new list I have created, some subscribers seem to receive
only some of the postings to the list, not all the postings, in a
seemingly random way.
The missing posts are not in the recipients' spam filters. I
suspect this may be related to complications related to the newer
anti-spam methods SPF, DMARC, DKIM. I don't know how those things
work, and I have the default settings (in Mailman 2.1.29) for
them.
What can I do to improve message delivery?
Thomas Gramstad
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