To get to this page, go to Settings → Misc Settings -> Disk/Memory Checking.
This page lets you set how VPOP3 checks for available resources before performing some actions.
Some actions that VPOP3 performs can require a large amount of disk or memory space, so VPOP3 can check that sufficient space is available before performing these actions. The parameters for these checks are specified on this page.
Be aware that these checks are performed in regards to the resources available to VPOP3 itself, not necessarily on the whole computer that VPOP3 is running on. For instance, the disk space check is for how much space is available to VPOP3. VPOP3 checks on the disk where VPOP3 is installed, and any disk quotas on the computer will apply. So, there may be lots of free disk space, but if there is a disk quota limiting the space available to the user which VPOP3 is running as, VPOP3 may see that there is not sufficient space available to it. Also, if you are using the 32 bit version of VPOP3, VPOP3 will only have access to 3GB of RAM, regardless of how much RAM there is in the PC itself.
The SMTP Server Disk Space Check 1 is performed before VPOP3 will accept an incoming SMTP connection. You should set this to at least 10 times the maximum size of the messages you will receive. If there is not sufficient disk space available, VPOP3 will refuse the SMTP connection and tell the sender to try again later.
The SMTP Server Disk Space Check 2 is performed before VPOP3 will process an incoming SMTP message. You should set this to at least 5 times the maximum size of the messages you will receive. If there is not sufficient disk space available, VPOP3 will refuse the message, and tell the sender to try again later.
The POP3 Client Disk Space Check 1 is performed before VPOP3 will start collecting mail using POP3. You should set this to at least 10 times the maximum size of the messages you will receive. If there is not sufficient disk space available, VPOP3 will skip the POP3 collection and report an error to the administrator.
The POP3 Client Disk Space Check 2 is performed before VPOP3 will download an incoming POP3 message. You should set this to at least 5 times the maximum size of the messages you will receive. If there is not sufficient disk space available, VPOP3 will skip the message (and try it again later) and report an error to the administrator.
The POP3 Client Required Free Memory check is performed before VPOP3 will start collecting mail using POP3. You should set this to at least 5 times the maximum size of the messages you will receive. If there is not memory sufficient disk space available, VPOP3 will skip the POP3 collection and report an error to the administrator.
