On 25 April 2012 07:42, Prabhpal S. Mavi <prabhpal at digital-infotech.net>wrote: > Dear Community Friends Greetings, > > i work with ISP, we host email service for almost 500+ companies and 200+ > mail servers relay through my smart host. > > i implemented something that when our smart host would become blacklisted. > It will automatic switch to next available smart host (which is ready > sitting). that mean it will start relaying message through another smart > host automatically. > > i think i must tell little background as well. it is actually php script > that perform blacklist check every minute through cron. if it found that > IP is blacklisted. It will then insert "relay host =" value in main.cf and > reload postfix service. When IP is no more blacklisted it will then remove > the same directive from main.cf and reload postfix. > > everything is working as expected. i have one question, when we reload > postfix does it drop active SMTP session? > > for example lets say that remote SMTP server is delivering message to my > postfix that has 8MB attachment. message was not fully transferred. lets > say that 4MB was transferred. and i issued "postfix reload". will that > connection drop or continue to deliver the mail? > > > Thanks / Regards > Prabhpal S. Mavi > > > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > Postfix reload will not disrupt any connection and in your example the mail will continue to be delivered -- Kind Regards Earl Ramirez