We're experiencing the same memory leak issue and are now on build 9224. We've had a support ticket open for over 5 months with no resolution. We're also running SmarterMail Enterprise, and originally reported the problem when our server was running Windows. Since then, we’ve migrated to Linux, but the issue still persists. It's extremely frustrating, especially given the lack of meaningful updates from support. I'm glad to see we're not the only ones noticing this. Hopefully, increased visibility here will help move things forward, as this is now holding up other server migrations.

#!/bin/bash

# Clear page cache, dentries, and inodes
sync; echo 3 > /proc/sys/vm/drop_caches

# Optional: log the action
echo "Memory cleared at $(date)" >> /var/log/memory_clear.log

chmod +x clear_memory.sh

Step 2: Set up a cron job to run it every 3 hours

crontab -e

0 */3 * * * /path/to/clear_memory.sh

⚠️ Important Notes:

• This operation requires root privileges. You’ll need to run the script as root or use sudo.
• If using a regular user's crontab, prepend sudo (and make sure the user has permission):

0 */3 * * * sudo /path/to/clear_memory.sh

• Alternatively, place the script in /etc/cron.d/ as a root-level job.

sudo bash clear_memory.sh

"That's definitely unfortunate and potentially illuminating. I would be curious if we could try to do an uninstall and reinstall of SmarterMail and see how it performs after? If it doesn't have any really noticeable difference on impact, I would be curious to see if we could try switching from using the built-in web server over to nginx or Apache and see if the performance improves?"