Setting up Exim to use separate SMTP credentials for each CPanels account

[gesman]

I've rented dedicated server (Centos 6+WHM) and want to use it for my sites as well as for a few friends' hosting needs. While making first babysteps moving few of my own CPanel accounts from another hoster - I found out that it was already blacklisted by Google on IP level.
I installed ConfigServer tools, closed most holes (albeit I guess too late?) and was thinking about solution for this email problem.

My idea, is that instead of spamming deaf ears of Google to unblock me (which i did anyways) - I'd get Sendgrid account and setup Exim to use Sendgrid SMTP for all outgoing email. Which should work for myself.

But I want other Cpanel accounts to use their own SMTP credentials for emailing (not my own).

So the question is - is it possible to setup Exim so that each Cpanel account would use it's own SMTP credentials for outgoing emailing?

Gleb

 

[Infopro]

You can if you have them, give each account different iPs. But, IPs cost money. If you just picked up a new server and new IPs, and that server is setup properly and secure, you should be able to get off any blacklists by asking them to remove you stating that you just got the server and IPs. Or, you could contact your Hosting Provider and tell them the issue and see what they can do for you.

Certainly easier than a custom solution I would think.

 

[gesman]

Hosting provider gives hardware (service is not managed) and is not really willing to babysit clients on a service/software levels.
And I cannot give each account separate IP.

I'd rather segregate SMTP credentials on a CPanel account level, if that is at all possible.