On 19/12/2024 02:41, L. Mark Stone via mailop wrote:
Also, again, no disrespect, but I don't see anything wrong with the DNSBL's suggestion for you to grep your logs for undeliverable outgoing messages within a certain timeframe. Seems sensible and quite helpful as they've given you a specific timeframe in which to search, and a specific bounce message for which to search.
An arbitrarily picked timeframe can not be proportional to the size of the operation. The volume some send out in a day, others send in a second.
You also assume there's a bounce message, that might not be the case. Especially if we're speaking of UCE, some users of that list accept the first few letters (probably for sampling purposes) then later list you.
There are also spamtrap operators that accept mail on mistyped domains (for example the shady no-name "mail.h-email.net" operators), in which case it's basically unavoidable that there will be some hits (due to the sheer amount of domains that can be mistyped) that likely feed some mystic engine.
Spamtrap operators being vague can lead to really kafkaesque processes to figure out what happened and who the culprit is, if it even was an actual culprit and not just some random human mistake someone was eventually guaranteed to make.
And if that suggested grepping exercise yields a very large number of results, doesn't that also inform that some changes in how your users use your system are likely called for?
Tell customers that some spamtrap operator thinks we have too many and should downsize to make logs more searchable?
That sounds a bit goofy. I've also seen a few that think they should be able to dictate the shape or form your PTR records have, which is equally goofy.
Best Regards, Taavi
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