Hello,

I have bellow VPS account:
- CentOS 5.6 OS
- Webmin control panel installed
- Postfix server installed
- 3 domains created (3 Virtual servers)
e.g. domain1.com, domain2.com and domain3.com
- 2 available IPs
e.g. 44.44.44.44 and 55.55.55.55

Currently all domains use the main (shared 44.44.44.44) IP. What i would like to do is:
1. to use the second IP (55.55.55.55) for domain3.com, and
2. every email sent from domain3.com to be sent also from the second IP (55.55.55.55).

Till now I have changed the IP of domain3.com from Webmin menu, but when I hit domain3.com in my browser I see the primary Virtual Server (domain1.com). Only when i hit directly the second IP (55.55.55.55) in my browser i see the domain3.com. Do you know how i can fix this? Is there something i should do with the Name Servers of domain3.com?

Then after I fix this, do you know how i will tell Postfix to send emails name@domain3.com from the second IP (55.55.55.55)?

Thank you in advance,
Best Regards,
Vasilis.

If you want to specify IP address to send mail from (postfix), use smtp_bind_address key in your config.

See
http://www.postfix.org/postconf.5.ht...p_bind_address
http://www.postfix.org/postconf.5.html#inet_interfaces


Overview http://www.postfix.org/smtp.8.html

Thank you for your reply,

I will look deeper into those Postfix parameters.
My main purpose was only to send e-mails from different IP and giving domain3.com the second available IP seemed to me like an answer.
Now i see that i only have to configure Postfix and send emails from different IP (by initializing a new Postfix instance maybe?).

Regards,
Vasilis.

If postfix supports 'proxy:' and 'hash:' as a value of 'smtp_bind_address' (see documentation of postfix) you needn't run the second instance of postfix.

I have made the following modifications in order to tell postfix that mails sent from domain3.com should be sent through second IP:

1. In /etc/postfix/transport:
domain3.com smtphandler1

2. In /etc/postfix/main.cf:
transport_maps = hash:/etc/postfix/transport

3. In /etc/postfix/master.cf:
smtp unix - - n - - smtp -o smtp_bind_address=44.44.44.44
smtphandler1 unix - - n - - smtp -o smtp_bind_address=55.55.55.55

4. Then run command "postmap /etc/postfix/transport" (in order to create transport.db file)

5. stop and start postfix

But still mails sent through user@domain3.com are sent from main IP 44.44.44.44 (actually all mails in VPS are sent throught main IP 44.44.44.44).
Any ideas?

Regards,
Vasilis.