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Date: Sun, 14 Jun 2015 18:35:17 -0700
From: Gregory Shapiro <gshapiro@gshapiro.net>
To: Frank Seltzer <frank_s@bellsouth.net>
Cc: freebsd-stable@freebsd.org
Subject: Re: Sendmail problem after upgrade to r284296
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> After the update I got your email and followed your instructions, except for
> moving dh.param because it didn't exist, and sendmail is happy now.

Happy to hear sendmail is happy.

> I checked and there is still no mention of this in /usr/src/UPDATING so my
> question is, when and how is dh.param supposed to be created?  Since I'm not
> the only one with this problem it doesn't seem to be something I did or
> didn't do.  What could have caused dh.param to not be generated?

That is a good question.  If you didn't create it, I don't know what did -- it's not part of the base build (checked on a newly installed snapshot).  Are you sure you didn't create it at some point?  Not even the mail/sendmail port creates it.