"CA failure" when receiving emails

[Neddy Nguyen]

Hi, I'm new here. I've posted this email to OpenBSD-misc list
but I think it should belong here, please excuse for my duplication.


I've just installed OpenBSD 5.5 on a spare server, and I'd like to
try to host my own email server, then decided to use default
OpenSMTPD 5.4.2 as MTA. And its config looks simple to just bring
sending/receiving up


$ cat smtpd.conf


listen on all tls tag DKIM

table aliases db:/etc/mail/aliases.db
table domains { instavn.com, mail.instavn.com }

# Uncomment the following to accept external mail for domain "example.org"
#
accept from any for domain <domainsalias <aliasesdeliver to mbox
accept for local alias <aliasesdeliver to mbox
accept for any relay


Test with my company email address and my outlook.com account resulted

that my server accepted one but denied other.


Oct 18 19:52:52 openbsd2 smtpd[1720]: info: OpenSMTPD 5.4.2 starting
Oct 18 19:52:52 openbsd2 smtpd[21081]: info: startup
Oct 18 19:53:53 openbsd2 smtpd[3465]: smtp-in: New session 958242f0656a7252 
from host mxch06.company.com [210.71.241.126]
Oct 18 19:53:53 openbsd2 smtpd[3465]: smtp-in: Disconnecting session 
958242f0656a7252: CA failure
Oct 18 19:53:53 openbsd2 smtpd[3465]: smtp-in: New session 958242f1a0de176f 
from host mxch06.company.com [210.71.241.126]
Oct 18 19:53:53 openbsd2 smtpd[3465]: smtp-in: Accepted message e1d3f2aa on 
session 958242f1a0de176f: from=<nh...@company.com, to=<n...@instavn.com, 
size=2378, ndest=1, proto=ESMTP
Oct 18 19:53:53 openbsd2 smtpd[3465]: smtp-in: Closing session 958242f1a0de176f
Oct 18 19:53:53 openbsd2 smtpd[31035]: delivery: Ok for e1d3f2aa8e480f45: 
from=<nh...@company.com, to=<n...@instavn.com, user=nedd, method=mbox, 
delay=0s, stat=Delivered
Oct 18 19:54:10 openbsd2 smtpd[3465]: smtp-in: New session 958242f2db2e8a6a 
from host bay004-omc1s4.hotmail.com [65.54.190.15]
Oct 18 19:54:10 openbsd2 smtpd[3465]: smtp-in: Disconnecting session 
958242f2db2e8a6a: CA failure


And Hotmail SMTP server will try to create new session over and over again 
multiple times
before it gives up.
What was wrong with my setup? And what'd I do now?


Thanks for your comments.

~Ned


# uname -a
OpenBSD openbsd2.whlvn.com 5.5 GENERIC.MP#315 amd64                             
          
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