Im having some issues with slow outgoing smtp I'm thinking maybe my internal ip is not on the whitelist?
How do I go about testing or checking this?
I did telnet into the port and it was not slow at all sending out but when users send email using an email client or the webmail client it takes several minutes to send out a message. So i just want to see what areas i need to check to resolve this.
Im on a centos 5.x box with sendmail, spamassassin as spam filter, and using openwebmail as the webmail client.