Postfix wont send email

X

xy16644

Today I replaced my old router with something better. It seemed to go quite smoothly until I tried to SEND email from FreeBSD/Postfix which failed. Funny thing is I can RECEIVE email just fine from the outside. The few emails I have tried to send since changing the router is sitting in the queue.

Heres the error I get:

Code: 
Aug  4 18:09:55 server postfix/smtp[81554]: ECC18217033: to=<xxxxxx@gmail.com>, relay=none, delay=367, delays=352/0.02/15/0, dsn=4.4.3, 
status=deferred (Host or domain name not found. Name service error for name=gmail.com type=MX: Host not found, try again)

When I SSH onto the server where Postfix is configured, I can ping DNS names and resolve them to IPs successfully. I can also telnet to other SMTP servers on port 25.

So why cant Postfix send email since the change? It baffles me :\
 
Try running the lookup postfix is trying to do from the machine:
Code: 
host -t mx gmail.com
 
After a bit of fiddling around I managed to get it working again.

I changed the DNS server from 192.168.0.1 to my ISPs DNS servers IPs rather and everything started working immediately.

Strange.
 
Those little routers that you get when you sign up for internet access can be kind of fiddly, which is why I run a BSD box as a firewall/router/DNS Cache. It is always much more reliable. Though I did just change my internet provider and had to figure out how to setup PPPoE, but once I got that working it has been great.
 
I have to say, this new router I bought is great! Its a Draytek 2820vn.

But I agree with you about using BSD for everything. When I am ready I may just setup my BSD server as a "DMZ host" in the Draytek to all ALL ports through and then let the power of BSD/PF protect everything.

What I really want to do is use OpenBSD as my firewall and have my FreeBSD hanging off the DMZ port.

So much to do ;-)
 
You must log in or register to reply here.
Back
Top