Hi Murray,

Some notes on DKIM and SPF using opendkim:



On 05/03/2018 06:43 AM, Andy Smith wrote:
Hi Murray,

On Wed, May 02, 2018 at 08:41:58PM +0100, Murray Crane wrote:
Andy, do you run a mail relay/smarthost for customers?
No - I don't think it would have much advantage over sending mail
out of your own IP address. Other than you not having to configure
it, I suppose, but it's not that hard to configure that bit.

I think the hard bit is doing the proper SPF and DKIM and DMARC and
so on and all of that is on you anyway.

I've got nullmailer running on one of my VPS, and it looks like I
configured it with a bitfolk.com smarthost, but it doesn't dig/accept SMTP
(so I'm guessing it either used to exist and doesn't any more, or it never
existed and I just made some shit up)
There has never been an outbound mail relay for customer use.


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