Hi all,
for some days now my server is under what I think is a dictionary attack. Someone is trying to send mail to [EMAIL PROTECTED] from apparently different IP sources every few minutes. Is there a way to activate the teergrube or tell esmtpd to ignore (not answer or delay) calls to unknown users at this domain?
Why are they doing this? Is this a header overflow attack or mere harvesting? Should I brace the server somehow against this thing?
Please? worried me.
Aug 15 08:31:33 debismurf courieresmtpd: error,relay=::ffff:206.46.170.58,from=<>,to=<[EMAIL PROTECTED]>: 550 User unknown.
Aug 15 08:31:41 debismurf courieresmtpd: error,relay=::ffff: 206.46.170.58,from=<[EMAIL PROTECTED]>,to=<[EMAIL PROTECTED] den.at>: 550 User unknown.
Aug 15 08:35:18 debismurf courieresmtpd: error,relay=::ffff:206.46.170.180,from=<>,to=<[EMAIL PROTECTED]>: 550 User unknown.
Aug 15 08:35:26 debismurf courieresmtpd: error,relay=::ffff: 206.46.170.180,from=<[EMAIL PROTECTED]>,to=<[EMAIL PROTECTED] aden.at>: 550 User unknown.
Aug 15 10:42:33 debismurf courieresmtpd: error,relay=::ffff:130.76.64.48,from=<>,to=<[EMAIL PROTECTED]>: 550 User unknown.
Aug 15 11:53:13 debismurf courieresmtpd: error,relay=::ffff: 222.120.40.173,from=<[EMAIL PROTECTED]>,to=<[EMAIL PROTECTED] et>: 513 Relaying denied.
Aug 15 12:01:14 debismurf courieresmtpd: error,relay=::ffff:206.46.170.68,from=<>,to=<[EMAIL PROTECTED]>: 550 User unknown.
Aug 15 12:01:23 debismurf courieresmtpd: error,relay=::ffff: 206.46.170.68,from=<[EMAIL PROTECTED]>,to=<[EMAIL PROTECTED] laden.at>: 550 User unknown.
Aug 15 12:49:19 debismurf courieresmtpd: error,relay=::ffff:211.155.223.13,from=<>,to=<[EMAIL PROTECTED]>: 550 User unknown.
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