Problems with connections

[Edward2a]

Hello to everyone.
Sorry to bother, probably I'm somewhat loose.

I'm having problems with various pf configurations.

Basicly, all of them work as router/firewall, with scrub, and all are behind a cisco asa.

1st: I have to make a nat rule for all passing trough smtp connections that send mail with attachments.
2nd: Connections dynamically drop. Wether downloading a file trhough web or ftp, or using rdp client, connection drops alike.

Any tips would be helpful.

Thanks in advance.