* Brandon Hilkert <bhilk...@vt.edu>: > We send out a pretty volume of emails right now using a combination of > SQL and IIS SMTP. We get rates now of about 5,000/min. We're looking to > not only improve the rates, but incorporate DKIM/Domainkey signing into > the process. The choice has been made to go with postfix along with a > queue directory on an XFS file system.
You can check if the disk I/O is the bottleneck by simply putting the queue fs in a RAM disk! > I'm using postfix as a relay, and having it sign the outgoing emails > with DKIM. That process was about twice as slow as without it. Without > DKIM, I'm getting a rate of 700/min. Signing takes time! htop will tell you IO rates and CPU usage... -- Ralf Hildebrandt Postfix - Einrichtung, Betrieb und Wartung Tel. +49 (0)30-450 570-155 http://www.computerbeschimpfung.de "Windows 95 /n./ 32 bit extensions and a graphical shell for a 16 bit patch to an 8 bit operating system originally coded for a 4 bit microprocessor, written by a 2 bit company that can't stand 1 bit of competition."
