[TUHS] Who is running their own mail server and what do you run?

Grant Taylor gtaylor at tnetconsulting.net
Thu Sep 21 11:52:13 AEST 2017


On 09/20/2017 06:55 PM, Dave Horsfall wrote:
> Dunno, as I've never used it, but there are some clever tricks that can 
> be used to enforce RFC-compliancy (a lot of spamware is written by 
> idiots who don't understand the finer points of SMTP):

Some of the ones that I've seen make me understand SMTP at all, or if 
they are using a library to abstract it.

>      Enforce proper DNS configuration e.g. must resolve etc, and must
>      actually exist.
> 
>      Make 'em wait a few seconds before sending your own banner, and drop
>      the connection if they send beforehand.

I do both of those.

>      Set up an enormous greeting banner (many long lines); there is nothing
>      in the RFC that says it has to be a single short line.

I've never thought about a long, multi-line banner.

> These simple measures alone cut out most of the crap; the rest are 
> handled by various DNSBLs and my private access list.

I agree with the first two, and I'd like to know more about the 
effectiveness of the third.



-- 
Grant. . . .
unix || die


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