Re: smtpd only Mail Server

> On Mon, 2021-08-09 at 20:02 -0700, latincom@vcn.bc.ca wrote:
>> Hello
>>
>> i have had a smtpd only mail server for 21 years; but now i have a big
>> problem related to dkim, dmarc, and spf. First, there is not man page,
>> archives are not clear for me, google is confusing; but i have added the
>> corresponding dns records, with the result that dkim is not signing
>> mail!
>>
>> Could someone please point me to specific openbsd place to look for it?
>>
>> thanks
>>
>
> Your information is far from complete, so don't expect anything
> useful from this mail, but:

This is the main OpenBSD list for users, i almost always got useful answers!

> - smtpd had its first commit in 2008 and back then was far from
> production ready: So are you using base smtpd, or sendmail, or
> something else?

Yes, 2000 it was sendmail, nginx, apache, smtpd if i remember correctly;
but my question is:

"Could someone please point me to specific openbsd place to look for it?"

> - I assume it's related to outbound mail, but even that is not
> completely clear to me.

No, it is the complete behaviour of dkim, dmarc, and spf. i got 0/10 at
this page: https://www.mail-tester.com/ and yes, i can receive mail, but
mine is considered spam!

> - Did you just put a dkim txt record in DNS without any additional
> configuration on your mailserver?

ok: i have 2 servers: 1. managed by nsd, which obtained 9.7/10 at the same
web page, not a problem; 2. vultr managed by their dns app, here i am not
able to make it work correctly. What should be the additional
configuration on the mail server please?

> - If you did configure something, what do you use? (e.g.
> filter-dkimsign, rspamd, dkimproxy, ...)
> - What kind of errors do you see?

Well, now that you mention it; my first step was pkg_add dkimproxy, and
minutes after, pkg_delete dkimproxy. It was all.

>
> So if I'm taking a blind guess I'd say smtpd, without additional
> configuration on outbound mail. In that case I suggest you install
> opensmtpd-filter-dkimsign from ports and read the readme:
> /usr/local/share/doc/pkg-readmes/opensmtpd-filter-dkimsign and
> filter-dkimsign(8).

Are you saying that i am in need of installing something that is not in
the system? i use only the base system, which for me has been enough.

>
> martijn@

Well at tha end you gave me a lot of information, thanks for that.