I have searched a lot on the net and there is not a single page where I could find information about the vpopmail's .dir-control file. Here is almost everything you want to know about it!

Probably we all had the problem where we increased the traffic limit for a plan sometime after having hundreds of users using the plan. If you do not increase the traffic limit for each user  then your users will pay usage fees even if their usage is between the old preset value and the new preset value.

So we must increase the  limits for all the users using our plans to match the plan limits set. But only if the user's preset limit is lower than the current plan limit. If a user set their limit very high, so they wont pay extra usage fees, we shouldnt lower their limits!

Below is the SQL command which will accomplish this task for the main plans, if you want to do it for one of your resellers, please change the reseller_id=1 to suit to the reseller ID in question.

update traffics set tt_size=float8(plan_value.value) from parent_child,accounts,plan_value where parent_child.child_type=121 and parent_child.account_id=accounts.id and traffics.id=parent_child.child_id and plan_value.plan_id=accounts.plan_id and plan_value.name='_FREE_UNITS_' and plan_value.type_id=121 and float8(traffics.tt_size)<float8(plan_value.value) and accounts.reseller_id=1;

After issuing the command above in your SQL server, you must restart your CP process!

ResellOne is an ICANN accredited registrar with competitive prices and product range. Their web pages can be reached from http://www.resellone.net/ . They are related with Everyones Internet Ltd. http://www.ev1servers.net/ . They also provide very cheap SSL certificates(probably the cheapest) and other value added services. Recently ev1servers merged with theplanet I think. 

They have a quite responsive support staff and online chat which makes their support service exceptionally good.

OpenSRS is one of the olderst ICANN accredited registrars. OpenSRS is somewhat pricey compared to other registrars. However their API is widely supported. However be sure to read OpenSRS agreement through for the fineprinted information. Their web site is at http://resellers.tucows.com/ They support 23 TLDs

OnlineNIC is an ICANN accredited registrar with competitive prices and product range. Their web pages can be reached from http://www.onlinenic.com/ They have a quite responsive support staff however the accuracy of the answers you get varies greatly.

This is the quick guide for enabling SSL on H-Sphere mail servers.