0 Byte GRP files
Problem reported by Jason - 3/24/2026 at 8:28 AM
Submitted

Yesterday we had a few support calls about mailboxes that were having issues displaying messages in webmail. When logging in to webmail, the Inbox showed email; however, scrolling down displayed dots. I have seen this before on large mailboxes, and eventually the mailbox will show messages; however, in these cases additional messages never show no matter how long you wait. A rebuild was issued, as well as a detach and reattach of the user, and the issue still remained. SSH'd into the server and looked at the users' inboxes, and we noticed some .GRP files that were 0 bytes. Those were removed, and the issue was corrected. Has anyone else experienced this, or can SmarterTools chime in? We have seen this behavior so far on three servers running 9575.

Thank You


Nathan Replied
We encountered this around 4 months ago, never managed to determine if it was a client issue or a fault in SM. Fortunately it has not reoccurred but given there were around 6 impacted users across several domains it seem like coincidence was unlikely.

The one thing we did was increase the RAM in the VM (Debian 13) as we had a theory the zero byte GRPs were possibly caused by SM crashing due to exhausting RAM. At the time there was more than sufficient RAM but we had seen what appeared to be a growing memory leak. This was our theory, it could of course be wrong.
Jason Replied
Thanks for the reply, Nathan.  I do not think that RAM is the issue in this case.   We have a ticket open now with Smartertools.  Hopefully they are able get to the bottom of this.

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