On Tue, 2006-09-12 at 15:34 +0100, Paul Howarth wrote: > > I run sendmail-8.13.8 at home to host my domain. Some domains will not > > accept mail from me because my address is from a dynamic address pool so > > I solved that problem by placing all of those domains in my mailertable > > and now route those messages through my ISP(RCN). Recently I have > > noticed that some of the mail is hanging for a while with 400 series > > messages saying 'Too many connections'. How fast do the people in this home type??? > I checked with RCN and after > > many wasted hours on hold I found out that I need to limit the maximum > > number of connections to their SMTP server to 4. Four shall be the > > counting. Five is too many and six is right out! > > > > Can someone please tell me what the incantation is to limit the number of > > simultaneous connections to a particular server? I'm not looking to > > limit incoming conncetions. I'm not looking to limit the rate of > > incoming or outgoing connections. I just want to set the max nr of > > connections from me to RCN to no more than four. > > Looking at the holy README file of Antioch in the sendmail-cf package, > it appears that setting confHOST_STATUS_DIRECTORY and > confSINGLE_THREAD_DELIVERY will have the result of limiting outbound > connections to any one host to 1. Whilst this is not 4, it's likely to > at least get your mail delivered eventually. Setting delivery mode to queued and doing frequent queue runs might be the best option. Sendmail normally will only open one connection to a particular destination on queue runs so both ends save time reusing the cached connection. And you can control the number of possible outbound connections delivering queued messages with confMAX_QUEUE_CHILDREN and confMAX_RUNNERS_PER_QUEUE. -- Les Mikesell lesmikesell@xxxxxxxxx
