From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <456DE185.2060007@anvil.com> Date: Wed, 29 Nov 2006 19:37:41 +0000 From: Dave Lukes User-Agent: Thunderbird 1.5.0.8 (X11/20061025) MIME-Version: 1.0 To: Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu> Subject: Re: [9fans] spam protection vs. secondary mx'es References: <2884d2815389700c3eb2547c74a9aaf4@coraid.com> In-Reply-To: <2884d2815389700c3eb2547c74a9aaf4@coraid.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Topicbox-Message-UUID: e8c8295a-ead1-11e9-9d60-3106f5b1d025 Secondary MXes? We don't need no stinking secondary MXes. Seriously: does anyone see a reason why you'd want one? A long time ago I saw a well-argued case for losing it. Basically 1) it encourages spammers 2) a secondary MX is just another hop in the store-and-forward chain, so why bother? Leave it where it is until the primary comes back up. I implemented the change nervously on anvil.com and, guess what? Our spam volumes plummeted. It may feel comforting to have a "backup", but unless you expect your primary to be dead for days (and have a means to pick the queued mail up from the secondary MX), it actually makes very little difference: you're just asking your secondary MX to queue it for you instead of the sender. DaveL erik quanstrom wrote: > i had this problem a while back. i eventually convinced > my secondary to run greylisting, but in the mean time i > just dropped my secondary mx. > > - erik > > On Wed Nov 29 04:42:41 EST 2006, r.raschke@tombobWegDamit.com wrote: > >> Hiya, >> >> how do people use greylisting and /mail/lib/sender protection in the >> presence of a secondary MX? >> >> My greylisting is roughly 80% useless, since spammers appear to know >> that a secondary MX will effectively bypass the greylist protection. >> >> Having recently started using /mail/lib/senders, I am seeing a lot of >> rejections due to the secondary MX. At the moment it does not really >> look like I am loosing any real mailing list traffic, but it is >> slightly disconcerting, since a network outage near me will probably >> mean I'll be rejecting real traffic once things are back. >> >> I am starting to question my belief in running my own mail server. Do >> people just use gmail or something and not bother with anything else? >> >> Robby >> >> -- >> "Weg damit" is german for "get rid of this". >>