[TUHS] Who is running their own mail server and what do you run?
gtaylor at tnetconsulting.net
Thu Sep 21 09:31:36 AEST 2017
On 09/20/2017 04:54 PM, Steve Simon wrote:
> My spam filtering is all plan9 based but the ideals are all portable.
I would love to hear more about how (and why) you're using Plan9. I'm
> Greylisting and delaying a few secs before starting the SMTP
> conversation are my most successful filters, After this comes
> SPF and using spamhaus to validate the senders IP.
I forgot about pre-greeting delay. I also use that. It's amazing how
much difference even 1 second makes.
I think it's also amazing how many spam bots try tricks to get around
spam filtering, like connecting to a high order MX that hypothetically
has less spam filtering. - JunkEmailFilter's Project Tarbaby does
phenomenal work with that. Plus, it feeds their RBL which I use as a
data signal for SpamAssassin. }:-)
> I reject some silly domains like localhost.com and usernames like
> user and test.
Are you referring to the purported sender? Or something in your domain?
Are you referring to SMTP Authentication or email addresses?
I have disabled SMTP Authentication on my main MTA and only allow it on
> I also have a list of regexps which match the reverse dns
> addresses of adsl blocks which catch many spam bots.
Thankfully I've not had to deal with those. (At least not that I'm
> The regexps sound like a lot of work but I have some scripts to
> analyse my logs and suggest patterns, so its just a click or two
> I can block somthing like:
Grant. . . .
unix || die
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