When I submit mail to smtpd, Mozilla Seamonkey prompts me with the
following:
This site has requested that you identify yourself with a certificate:
mail.targetmeister.com:587
Organization: ""
Issued Under: "StartCom Ltd."
The above prompt only occurs the first time I send mail after restarting
Seamonkey. I do have an email signer/recipient certificate stored in
Seamonkey. I just comply with the above request by sending my
certificate and my mail is successfully relayed.
My question: is OpenSMTPD asking my email client for a certificate when
relaying mail?
I'm just curious about what is going on. I'm fairly new to OpenSMTPD.
This did not happen previously when using Postfix. Is this just
additional automated security offered by OpenSMTPD?
Here is the server config that Seamonkey is sending mail to directly on
the submission port:
$ cat /etc/mail/smtpd.conf
# $OpenBSD: smtpd.conf,v 1.6 2013/01/26 09:38:25 gilles Exp $
table users "/etc/mail/users"
table passwd "/etc/mail/passwd"
table aliases "/etc/mail/aliases"
table domains "/etc/mail/domains"
pki tm certificate "/etc/ssl/mail.targetmeister.com.crt"
pki tm key "/etc/ssl/private/mail.targetmeister.com.key"
listen on localhost
listen on mail port smtp tls pki tm auth-optional <passwd>
listen on mail port submission tls-require pki tm auth <passwd>
accept from local for local alias <aliases> deliver to mbox
accept from any for domain <domains> virtual <users> \
deliver to maildir "/var/spool/vmail/%{dest.domain}/%{dest.user}"
accept from local for any relay
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