On 13/10/2010 12:16, Daniel Pittman wrote: > Nigel Allen <[email protected]> writes: > >> Customer of mine currently has their own in-house mail server. Machine runs >> CentOS 4.8 with Sendmail, spamassassin and mimedefang. RBL's are covered in >> sendmail.mc with spamhaus and SORBS. >> >> Can anyone think of any reason why this combination would not play nice if >> they also implement greylisting? > Nope. > >> Any gotchas anyone is aware of? > Some providers, typically big ones (*cough* Telstra, Optus) tend to play > poorly with greylisting: they have a separate pool of senders if the first > attempt is not accepted, and can delay up to 24 hours before sending.[1] > > Some greylisting tools have a set of exceptions for dealing with this, others > don't. The later ... hurt more. :) I'm currently experimenting with milter-greylist which has automatic and/or manual whitelisting.
This came about because my customer wants to use automatic "away from my desk" or "vacation" responses but doesn't want them to go out to everyone willy-nilly (including spammers) - rather they want to restrict them to "known" customers of theirs. We're probably going to drop SORBS because of the number of complaints from their customers who remain convinced that hotmail is suitable for business email despite the repeated application of the clue stick. It looks like its SORBS (and not spamhaus) that are causing this problem bouncing email from hotmail servers that are on their "naughty list". My thought was to trade off the reduction in bounces from SORBS against the introduction and increased security of milter-greylist. N/ -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
