Brian Carpenter wrote:
You can check your mail log to see if you are seeing a high number of Yahoo!
deferrals. If so then those deferrals may be behind those unsubscribes,
Yahoo deferrals should not cause this. The message should be simply
queued and retried in the MTA with no notification to
my experience, Yahoo always ultimately accepts the message before the
MTA gives up and returns failure to Mailman.
We have a server where this problem is happening and in the case of this
particular server (being solely used by a single non-profit organization)
Yahoo is being VERY persistent in
