Environment
Situation
Resolution
Here are a few things to check:
1) Is GWAVA causing your slow mailflow?
If GWAVA is the cause of your sluggish mail flow, then you'll see mail backing up in the ...\[domain]\MSLOCAL\GWVSCAN\4 folder. If there are no messages backing up here, then your problem most likely lies elsewhere
Keep in mind that it's common for mail to back up at certain times of day or for short periods of time (for instance, during a mass spam attack). If mail is backing up frequently or if backed up mail never clears, then you have a problem
2) Restart GWAVA
Wait at least 5 minutes for GWAVA to fully initialize and pick up speed. Now monitor your ...\GWVSCAN\4 directory for a few minutes and see if the mail is depleting. It may take some time to empty this directory, but as long as the amount is going down, you're in good shape
If a restart is unsuccessful, continue to step 3
3) Clear the backup
Shut down GWAVA and your MTA
Rename your ...\[domain]\MSLOCAL\GWVSCAN folder to GWVSCAN.old
Remember: after resolving mail flow issue, make sure to move your old messages from the GWVSCAN.old directory to the new GWVSCAN folder. Keep subfolders intact (GWVSCAN.old\4 ---> GWVSCAN\4, etc.)
Start up your MTA and follow step 2 to restart GWAVA and test your mail flow
4) RBL/SURBL Delays
See the following article for troubleshooting RBL/SURBL delays: https://support.microfocus.com/kb/doc.php?id=7021032
5) VS Threads
See the following article to increase your vs threads: https://support.microfocus.com/kb/doc.php?id=7021033