I have a very strange problem - I am running PIX 525 with ver 7.2 software. I am receiving email from my customer OK. But i have only one customer who is unable to send me emails with attachments, but can send me plain text.
Below is the error message
18.104.22.168 %PIX-6-302014: Teardown TCP connection 21751289 for INT-PUB:IP Addr/45556 to INT-DMZ1:IP addr duration 0:00:01 bytes 137772 TCP Reset-O\
I dont think its my firewall, but either something in MailMarshel or the otherend.
The other end is able to send email to everyone with attachments without a problem.
I can send him an the other end an email with an attachment successfully
Re: PIX 525 - and Mail attachment notr get throught
Never heard of an incidence in which ASA was responsible for such a result. Anyway if you disable smtp inspection in ASA, ASA will be out of the question completely for mails, but I am sure that wont have any effect. Most probably it is related with MailMarshal. Check the following link
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...