Your 'this' meaning 'retrying on 4xx errors'?
no, against Worms and viruses
so far i discovered is a very simple way of folowing
the basic instruktions from german BSI Ministerium
1: all email with executable atachment got immediatly
erased.
> /DEV/NULL
That is basic. But before that, you should SMTP-reject,
because
rejecting garbage is better than discarding garbage.
And rejecting early
(based on a virBL) is even better than rejecting after
the SMTP-DATA is
in.
shure
for this there is spamhaus integrated and SPF planed in our mail system
2: zip and other archives have to be renamed from
the sender
and this information given to the receiver or 1:
I don't mind normal zip-attachments. Software like ClamAV
detects
harmful zip-attachments.
You think different if you receive a few hundred a day
some of this crap is probably originating from Company Customers PC's
from all the world
so blocking them on no
standard rules, harms the business kommunikation.
ok its getting to far from the origin point off discussion to this topic.
My basic intention to give a comment was to apeal to think twice about rules
who may work for u if you have a handfull email the day to send.
For me its getting more and more difficult to make every day shure that all
email got out to the intended receiver. and we dont spam at all
Thinks like Greylisting, blocking TLD and so on in the hands of somone
who is not realy experienced and in panic because he has to
master a virus atack can cost a lot money if people cant receive there messages.
youst imagine a spare part for a ocean liner..............
some simple basic rules helping sometimes more to get your goal than
complicated non standard procedures where you harm some innocent sender from as
SPAM detectet email who is non
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