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Just got this email a little bit ago from Half Pixels.
This module is an absolute must have and to be quite honest we delayed developing it as we felt this should be a built in option and expected to see it in recent WHMCS updates. But as it didnt materialize we developed it for ourselves and you our valued customer.
So the module i am talking about is called WHMCS Subscriptions.
This module doesn't just protect you against the CAN SPAM act laws, it provides fine grained control of the emails your clients receive. You can manage it, and so can your clients.
You/the client can choose subscription controls for any of the email types WHMCS sends. So a user can choose to accept domain emails, but not general emails etc.
Not only do you have complete control over the subscription rules, but the interface is plugged right into your client area with any template editing or file additions.
The subscriptions link will be displayed under the clients details with there custom fields when logged in. And in emails you can add a smarty template var which will add the subscription link to the emails.
Oh and its all token based, so the client doesn't even have to be logged in to change there subscriptions settings (unless of course you want them to be).
More info link: http://clients.no-half-pixels.com/whmcs-subscriptions
Seemed like a pretty good module to me, haven't tried it, just thought some of you might find it useful.
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