Date: Thu, 26 Sep 2024 16:01:33 +0100 From: Frank Leonhardt <freebsd-doc@fjl.co.uk> To: FreeBSD Mailing List <freebsd-questions@freebsd.org> Subject: Re: Odd SASL Behavior Message-ID: <6651a50a8935812ae8868e9e3e4c121c@fjl.co.uk> In-Reply-To: <c91ec0a9-457f-4f73-bf28-d717c9c446c7@gmail.com>
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On 2024-08-15 21:39, Tim Daneliuk wrote: > This is a puzzler - hoping someone can shed some light .. > > I have a sendmail/SASL configuration that's been unchanged for years > and years. > > Today, all of a sudden, users were unable to send mail from their UAs > because SASL > was grouching about failed password authentication. After poking > around and finding > nothing having changed, a reboot fixed this. > > Ideas? There's something spammers can do that upsets (old) SASL causing it to go wonky and start rejecting authentication. IME it also consumes a LOT of RAM while it's happening. A solution is to monitor your pagefile and issue a "service saslauthd restart" if it starts to grow. A reboot will also fix it, of course, but when I figured out what was killing the server this worked pretty well instead. Blackholing an IP that's failed authentication too often also helps. Regards, Frank. -- ------ 25-Nov-24 My apologies to everyone who I appear to have ignored for the last few years. A procmail script was misfiling some replies to Questions to the wrong folder.help
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