[SOLVED] How to Configure SMTP Server which can relay mail based on IP address

mahi_nix · 11-04-2011, 08:43 AM

Hello Freinds,

I have to configure SMTP Relay server which can realy mails based on IP addess.

Is that possible and on which mail server. I prefer postfix server. I have Debian installed in my machine.

Any help would be appriciated.

Thanks in Advance

deep27ak · 11-04-2011, 09:14 AM

I have not worked on postfix

I can guide you with sendmail server for relay

Code:

#yum -y install sendmail

Code:

#vi /etc/mail/sendmail.mc

(add these lines or check if they exist)
define(`SMART_HOST', `smtp.your.provider')dnl <--------------provide the details of smtp server in my case I use smtp.gmail.com

define(`RELAY_MAILER_ARGS', `TCP $h 587')dnl <--------------port for relay

define(`ESMTP_MAILER_ARGS', `TCP $h 587')dnl <--------------port for smtp

TRUST_AUTH_MECH(`EXTERNAL DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl---------------------------------->uncomment this line as done here

define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl------------->uncomment this line as done here

FEATURE(`authinfo', `hash /etc/mail/auth/client-info.db')dnl------------->add this line

dnl # DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')dnl

DAEMON_OPTIONS(`Port=smtp, Name=MTA')dnl---------------->uncomment and remove loopback

FEATURE(`access_db', `hash -T<TMPF> -o /etc/mail/access.db')dnl --------------> make sure this line is uncommented

DAEMON_OPTIONS(`Port=smtp, Name=MTA')dnl------------------------>remove loopback address

Code:

#cd /etc/mail/auth
#vi client-info
AuthInfo:(smtp_server) "U:username" "P:Password" "M:PLAIN"
AuthInfo: "U:username" "P:Password" "M:PLAIN"

Code:

#makemap -r hash client-info.db < client-info

Code:

#vi /etc/mail/access
Connect:your-ip           RELAY

Code:

#m4 sendmail.mc > sendmail.cf

Code:

#service sendmail restart

best of luck

mahi_nix · 11-04-2011, 09:36 AM

Hello Deep27ak,

I need the server which is able to receive an email from specific IP address and then relay it to outside. no other IP's which are not in allowed list can realy email from my SMTP server.

deep27ak · 11-04-2011, 09:41 AM

Quote:

Originally Posted by mahi_nix

Hello Deep27ak,

I need the server which is able to receive an email from specific IP address and then relay it to outside. no other IP's which are not in allowed list can realy email from my SMTP server.

Code:

DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')dnl

instead of 127.0.0.1 give your IP

mahi_nix · 11-04-2011, 10:23 AM

Hello Deep27ak,

Do we required first configuration with secondone which you have suggested here.

and this configuration will relay mail comes from specific IP address (Specifica SMTP server) and relay it to outside?

Lets Say it will receive mails from 192.168.0.254 server and realy it to ourside if i will do "DAEMON_OPTIONS(`Port=smtp,Addr=192.168.0.254, Name=MTA')dnl"?

deep27ak · 11-06-2011, 10:11 PM

Quote:

Originally Posted by mahi_nix

Hello Deep27ak,

Do we required first configuration with secondone which you have suggested here.

and this configuration will relay mail comes from specific IP address (Specifica SMTP server) and relay it to outside?

Lets Say it will receive mails from 192.168.0.254 server and realy it to ourside if i will do "DAEMON_OPTIONS(`Port=smtp,Addr=192.168.0.254, Name=MTA')dnl"?

Sorry for the late reply

yes, all the mails will pass from this IP which will act as a RELAY but don't forget to mention the IP in access file and map it to access.db