I use a ASA 5505 in standard config. Today I noticed that I can't send emails with attachments bigger then 100kb anymore since I changed my firewall to the ASA.
I'm using MACOSX 10.5.1 with Mail 3.0. When trying to send mail without attachments it works nicely, but with attachments it will stop at some stage (e.g. 23%) as if the connection was lost and then Mail times out.
When using a different firewall I don't have any problems.
Funny thing is, when using a Win machine and thunderbird I don't have any problems at all, even with attachments.
Any ideas on how to solve the Problem? Does anyone have similar problems?
We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...