[Cialug] Email server

[David Champion]

On my personal server, I use postfix with a few filters, spamassassin and
some procmail rules. I have used RBL's with postfix with mixed results,
they can be annoying when they block too much incoming email.

If you're used to the level of spam filtering you get with gmail or
office365, you may not be super happy with that setup. I also used to
maintain a Barracuda spam filter cluster, those can be a lot of fun to keep
up and fine tune.

Basically spam filtering is a pain, and having gmail do it for you is
pretty nice.

OTOH... if you ever have to deal with getting someone OFF various spam
filters... good luck with that.

-dc


On Mon, May 1, 2017 at 9:59 AM, Andrew Denner <linux-list at upeke.com> wrote:

> On possibility on the sending email side would be to use the free tier of
> Amazon SES (https://aws.amazon.com/ses/) as a smarthost for your local
> mail
> server. https://docs.aws.amazon.com/ses/latest/DeveloperGuide/postfix.html
> It should be free for most sane home use cases.
>
> On Mon, May 1, 2017 at 7:23 AM, <khamil8686 at gmail.com> wrote:
>
> > Someone mentioned using gsuite. I am dragging my feet a bit since I have
> > had my gmail for over ten years. I see google has set up end-to-end
> > encryption on gsuite, and that’s $5/mo. So, I could keep my email and
> have
> > it be encrypted as well and the data wouldn’t be owned by google so they
> > couldn’t sell it even if they can get the encryption key. Then I could
> just
> > set up a mail server for fun and learning how to do it. Sorry, I forgot
> who
> > mentioned gsuite. Is that what you meant?
> >
> > Thank you!
> >
> > From: Nicolai
> > Sent: Sunday, April 30, 2017 10:37 AM
> > To: Central Iowa Linux Users Group
> > Subject: Re: [Cialug] Email server
> >
> > On Sun, Apr 30, 2017 at 06:11:15AM +0000, Jared Brees wrote:
> >
> > > Now that I have Mediacom with a Dynamic IP, I point
> > > www.relatedtotechnology.com<http://www.relatedtotechnology.comto
> > > geek-rtt.ddns.net.
> >
> > > So, when pinging my
> > > www.relatedtotechnology.com<http://www.relatedtotechnology.com>, it
> > > auto-resolves to geek-rtt.ddns.net (as it's just a CNAME), but pinging
> > > the IP address gives you 127.2.3.1-client.mchsi.com.
> >
> > > Not sure if the auto-resolve on CL was a result of there actually being
> > > a PTR record, or some other phenomenon.
> >
> > The behavior you describe is a result of the implementation of your ping
> > program giving helpful information, not your ISP.  On OpenBSD, for
> > example, ping doesn't consult the DNS when doing e.g. "ping 192.0.2.8".
> >
> > Similar for traceroute.  You have flags like -n and -A which control
> > informational/convenience functions for DNS and ASN, respectively.
> >
> > Nicolai
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