[TriLUG] linux mail servers, RBLs, relays, etc.

[David Brain via TriLUG]

Mailgun is relay as a service option - not used it other than for home use
(have a free test account as my network relay) but seems like a good
service.

Note that a commodity cloud IP tends to have a lower 'reputation' spam wise
anyway for spam filters so that could be an issue (and who knows what your
'neighbors' are up too).

David

On Wed, Jan 10, 2018, 1:19 PM Ron Kelley via TriLUG <trilug at trilug.org>
wrote:

> I have used SendGrid in the past with great results.
>
>
>
> On 01/10/2018 12:53 PM, Dewey Hylton via TriLUG wrote:
> > This isn't really a linux question, though I believe it is not strictly
> off-topic because it at least involves linux systems ...
> >
> > I manage multiple linux-based mail servers for different customers. Most
> run Zimbra, but some are running opensmtpd (which I am liking more and more
> as time wears on). The problem I am running into is with the various RBLs
> ... and not my usage of them, either. Lots of folks out there leverage the
> RBLs to determine from what addresses they will accept smtp connections. In
> more than one instance now I have found outbound mail being blocked due to
> inclusion in one or more RBL. The pesky part of this is that the RBL listed
> an entire network based on one or more addresses which are not mine. So I'm
> being blocked thanks to someone with a similar address. Which means I'm
> being blocked for no fault of my own. Folks like Spamhaus are basically
> unresponsive (and when they respond they are unapologetic). I have moved
> networks multiple times in order to get around this. And that does work -
> at least for a time. But it is a huge pain in the backside. So now I'm
> thinking about changing tactics.
> >
> > I have considered spinning up a low cost vm and running my own relay
> (most likely opensmtpd), as moving THAT around would be a LOT easier than
> moving an entire zimbra instance in some cases.
> >
> > I have also considered a commercial solution. I know that companies
> provide mail relays as a service, and I'm hoping I can find one which
> protects their reputation enough that they stay off the RBLs. Can anyone
> here make a recommendation for one or more of these services?
> >
> > Or is there perhaps a better way to tackle this?
> >
>
>
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