Re: OT: firewalls and their sideffects on MTAs
> we are currently consulting a customer about what firewall (appliance)Avoid packet-level filtering of SMTP protocol, modern-day mailers
> to choose.
> Now mailing is business critical for them and following the DKIM/'smtp
> fixup' troubles I am wondering if there are any other known issues with
> firewalls when it comes to mailing.
are well capable of taking care of their own health.
Real threats stem from mail contents, where mail content filters
at the application level stand more chance of offering some protection.
This still does not relieve users from running virus checkers on
their own PCs, and regularly updating their software, as mail
is not the only path where malware can creep in.