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Probably "backscatter".
Someone sends a message to a random address on your server, and the server send back a error reply if that username/e-mail address doesn't exist. The addresses are compiled by using the book of names for babies, and other lists - all trying to guess valid e-mail address names. If it fails or bounces - no big deal to them. If it works, then they have a valid e-mail address they can sell for a few pennies. Unfortunately, in the meantime - your server is kept busy sending out ridiculous numbers of error messages. And sometimes, can even get blacklisted for all those error messages. Chuck ---------- Original Message ----------- From: Lewis Gardner <lew...@iglou.com> To: BlueOnyx General Mailing List <blueonyx@mail.blueonyx.it> Sent: Thu, 28 Sep 2017 00:01:17 -0400 Subject: [BlueOnyx:21425] localhost sending 14K emails in a month? > According to Usage Information, Email, Senders localhost on one of my > 5209R servers has sent 13,990 emails this month. Mostly during one week > and one other day. > > Is there any reasonable explanation for this behavior? > > What to do? > _______________________________________________ > Blueonyx mailing list > Blueonyx@mail.blueonyx.it > http://mail.blueonyx.it/mailman/listinfo/blueonyx ------- End of Original Message ------- |
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