Root cause:
The root folder / is out of space; and both /tmp folder and /opt/trend/imss/temp folder are in this partition. When users manually copy many files to /tmp folder, while the partition is out of space, it causes IMSVA to fail to write mail data files to /opt/trend/imss/temp. Mail scanning stops because of the write file error. They then get stuck in the Postfix queue.
To solve this problem:
- Use PuTTY or other SSH tools to SSH to IMSVA with root account.
- Remove the manually copied files under /tmp folder
- Flush the mail queue with postqueue command:
#postqueue -f
Always avoid copying files to /tmp folder. Use /var/app_data folder instead for tempoary file copies because the partition /dev/mapper/IMSVA-App_data is much bigger.