When I run the SMTP diagnostics tool on http://www.mxtoolbox.com
against my mail server, I always get about a 12 to 15 second transaction time and they report this as being "not good". I assume this is caused by one of the various mail filters running. Is this something that should be of great concern? Does anyone have any advice as to what I could look for to improve this time?
- Plesk 9.5.4
My server usually runs with a really low load so I'm not sure where the hang up is at. The processing time in the qmail-scanner log usually shows about 15 to 20 seconds. Again, that seems a bit slow considering the light server load and what seems like should be an ample amount of ram (8GB).
zen.spamhaus.org is the only RBL I'm using and I know those can slow things down a little, but 12 seconds seems extreme. I've tried removing DCC as well and that doesn't seem to make any difference.