[OpenBSD 4.2] sendmail setup

noir911 · 01-02-2008, 03:48 AM

I am trying to setup a mail server on my home test box. I bought a domain name and the dynamic IP address I get from my ISP is being updated using DynDNS (so, reverse DNS on mail.domain.com doesn't work)

Anyhow, I copied -

cp /usr/share/sendmail/cf/openbsd-proto.mc /etc/mail/mydomain.mc

and not sure what to change in there. I read the /usr/share/sendmail/README and Googled but most document are outdated or directly deal with this issue.

Could someone shed some light on this?

Thanks.

bsdunix · 01-02-2008, 08:41 PM

What are you trying to accomplish? Receive mail using your DynDNS address? Does your ISP block port 25? Are you trying to send mail via your ISP smarthost?

If your only trying to send mail via your ISP smarthost, what I did for a simple home setup was add:

Code:

MASQUERADE_AS(`ISP.DOMAIN')dnl
FEATURE(`masquerade_envelope')dnl
define(`SMART_HOST',`smtp.isp.domain')dnl

to /usr/share/sendmail/cf/openbsd-localhost.mc file. Then built the .cf file.

Code:

# m4 ../m4/cf.m4 openbsd-localhost.mc > openbsd-localhost.cf
# cp openbsd-localhost.cf /etc/mail/localhost.cf

Then restart the sendmail process or restart the system. There's probably other methods and network tweaks such as having sendmail listen on other than the localhost.

Make sure you edit your /etc/rc.conf.local file to reflect what you called your .cf file in /etc/mail.

Code:

sendmail_flags="-L sm-mta -C/etc/mail/localhost.cf -bd -q30m"

noir911 · 01-17-2008, 04:06 AM

Quote:

Originally Posted by bsdunix

What are you trying to accomplish? Receive mail using your DynDNS address? Does your ISP block port 25? Are you trying to send mail via your ISP smarthost?

Thanks for your help on smarthost. My ISP don't block port 25 or any other port.

I actually want to host mail with some OpenBSD hosting company and setup a proper mail server where the IP address would point to mail.mydomain.com for both reverse and forward DNS lookup. I cannot do with dynamic IP from my ISP at home.

I did a Google search with openbsd+mail+hosting and most of them are really expensive. I am on the outlook for something cheaper.

Thanks for any help.

bsdunix · 01-17-2008, 08:28 AM

Quote:

I did a Google search with openbsd+mail+hosting and most of them are really expensive. I am on the outlook for something cheaper.

Most the OpenBSD dedicated hosting companies I looked at start at about $100 USD.