I'm really not a fan of WHMAP. We purchased an owned license of it, and have had nothing but problems with it.
It uses direct SMTP port 25 to send mail. The problem with this is, you will open your server to spammers, by opening your server to allow WHMAP to use this.
whmAP will not assist in fixing the app, in our case. They tried to blame it on the server configuration. I have to admit, we secure our servers tight, so yeah, it's our fault whmAP doesn't work. They tried to convince us that opening port 25 for any script to use is perfectly safe. After I proved that theory wrong.....they went silent.
I'm overall very disappointed with whmAP. I suppose it would be a very nice application, but you get it to work properly, then you really need to check your server security as far as your mail server is concerned.
Enough ranting my thoughts about that.
I have heard that ModernBill is nice software, but I have never had the pleasure of using it.
There is however a free alternative to all of this as well:
- phpCoin
- Nixt whmManager
You miay want to give those a try as well.