This is the first time I have tried seting up a router. The problem is that my customer can go on the internet and get e-mail from a outside pop3 server but cannot send mail to a outside SMTP server. Can anyone give me an clue as to were to start looking for the problem.
The problem could may also be the ISP has blocked the SMTP port from unknown IP addresses. This is to prevent SPAMing. Is the DSL coming from an ISP and you are trying to use the SMTP server of another?
Check your access-list with a "show running-config" to see if there is any like this:
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...