My hoster have assigned to my server a secondary IP adresse. For example, my primary IP adress is 184.108.40.206 and my secondary IP adress is 220.127.116.11.
My donmain name "example.com" is binded to the seconday IP adress (18.104.22.168). On my Windows server 2008, I have IIS 7 and the virtual SMTP service installed.
From this server, I send email notifications to the users of my hosted application. The problem is that the first HOP receives the emails from the primary IP adress (22.214.171.124) instead of the secondary IP adress (126.96.36.199), even if I connect to the virtual SMTP server through the secondary IP adress (188.8.131.52).
How can I make IIS Virtual SMTP server sending emails through the secondary IP adress rather than the primary adress.