Web Hosting Talk : Web Hosting Main Forums : Hosting Security and Technology : SMTP Question

[X-treme]

Anyone know if it is possible to bypass the SMTP domain relay or to enter a wild card of some sort that would allow mail to be sent to any .com,.net.org without physically adding them all to the relay list? I really dont need them all but I am tired of adding new domains everytime a host wants to send mail to one that is not on the list.

Thanks in advance,

X-treme

[Jason_Berresford]

The best thing you can do is install POP3 before SMTP
which you can read up on at: http://poprelay.sourceforge.net/poprelay.html

Or you can edit the sendmail.cf file to do the relaying.. if you would rather do that (not advisable, will allow your server to be left open for spammers) I can post the code you need to replace. Again not a good thing to do

[Chicken]

Originally posted by Jason_Berresford
The best thing you can do is install POP3 before SMTP
which you can read up on at: http://poprelay.sourceforge.net/poprelay.html

Heed the words of Jason I'll second the 'don't just open the server up' advice.

[X-treme]

Thanks for link I will look into it. I agree I dont want to open the server up. I just want to eliminate the need to add every domain that hosted accounts want to send mail to.

Thanks Again!!

X-treme

[Si-WHN]

just a small question...what MTA are you using? Sendmail, qmail...?

That will affect what pop b4 smtp software you can use successfully.

regards,

Simon

[X-treme]

I am using sendmail. I was thinking of switching to qmail but wasnt sure if there were any benefits in doing this or not.

Regards,

X-treme

[Si-WHN]

qmail is very good resources wise, but isn't fun compiling...has a rather steep learning curve.

On the upside, it's far more secure than sendmail, still had a reward available if anyone successfully hacks it ;-)

regards,

Simon

[garethfowler]

Have a look at http://www.exim.org

Exim, is similar to Smail, but better.
As for relaying, a big UK ISP has written a good method for this, you'll find it in the Documentation.

Rgds.

Gareth C. Fowler