> -----Original Message----- > From: [EMAIL PROTECTED] [mailto:mailman- > [EMAIL PROTECTED] On Behalf Of Beau James > Sent: Monday, September 08, 2008 2:42 PM > To: mailman-users@python.org > Subject: [Mailman-Users] Dealing with ISPs that blacklist by message > volune? > > Wondering whether anyone has suggestions for dealing with this > situation. > > I run two mailing lists for coachess (577 members) and referees > (377 members) in a local volunteer youth sports group. Not exactly > large lists, and typically low traffic - 3 or 4 messages on a busy > day, none at all most days. But occasionally, there will be a couple > of back-to-back messages e.g. a question and reply. > > Because it is a local organization, the list members tend to have > email addresses concentrated in a few ISP domains e.g "sbcglobal.net", > "comcast.net" (plus a lot who use Yahoo or Gmail, of course). > > Last week and again last night, the ISP server that hosts our domain > suddenly found itself on multiple blacklists. > > The trigger seems to be that some of our subscriber's ISP domans don't > like "too many" incoming messages per hour from one originating domain. > Example: > > [EMAIL PROTECTED] > Domain ayso45.org has exceeded the max emails per hour. Message > discarded. > > Worse, some of these ISPs apparently report the domain and the IP > address > of the originating MTA to some of the blacklist siets. In very short > order, > we're dead. And so are all the other lists hosted on our ISPs server. > > Rate-limiting messages from an originating domain seems like a brain- > dead > anti-SPAM algorithm that makes discsussion lists unusable. Our hosting > ISP tells me that we have to keep it under 60 *outbound* messages per > hour > to stay under these recipient ISP's radar, and has suggested using > "phplist" > to do so). At 60 messages per hour, a single message to our small > lists > would take 15 hours to be distributed (if the rate limiting is global > and > not per recipient domain). > > How are other's dealing with this? > > Thanks, > > Beau
Hi Beau: We do not rate limit our mailman clients and we rarely have any black list problems. When it does happen, it is usually with a single ISP and the issue is resolved within 24 hours. However this is very rare and all of our mailman clients are very happy with our service. We also make sure we have spf, domainkeys, and ptr records in place which generally keeps the major ISPs happy. We also configure our mailman server to send no more than 15 messages per smtp connection which seems to please most isps. We have one discussion list (medical software) that has over 3100 members that ends up sending over a 100,000 messages in a typical 8 hour day and this particular server has NEVER been blacklisted. I don't agree with your hosting provider's recommendation at all. If you are interested you can check our mailman service out at http://www.emwd.com/mailman.html. Have a great day and I hope your list problems work out. Mailman is a fantastic program. Don't let your hosting provider give it a bad rap. Regards, Brian -------------------------------------- EMWD.com - 'Powered by Techies' Blog.emwd.com - "Curious comments from a web hosting techie" ------------------------------------------------------ Mailman-Users mailing list Mailman-Users@python.org http://mail.python.org/mailman/listinfo/mailman-users Mailman FAQ: http://wiki.list.org/x/AgA3 Searchable Archives: http://www.mail-archive.com/mailman-users%40python.org/ Unsubscribe: http://mail.python.org/mailman/options/mailman-users/archive%40jab.org Security Policy: http://wiki.list.org/x/QIA9
