IMSS which is the next version of Trend Micro's Virus Wall provides the ability to do reverse DNS lookups. It is my understanding that this will help reduce SPAM from bogus addresses but will require more CPU resources to accomplish.
My question is is anyone else using Reverse DNS Lookup's? And what happens when a companies SMTP server is NAT'd behind a firewall and port 25 is just passed on to the internal SMTP server? The problem being that their External MX record will point to the Firewall but the SMTP packet will reflect the actual SMTP server name internally......When My SMTP server tries to reverse DNS lookup on it....it will not be able to resolve and My company will not be able to send e-mail back and forth with this company. Am I stating what happens correctly? _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED]
