OS: Windows/Linux; IceWarp Server Version: 11/10
This article explains what to do when you get the '451 4.3.5 Requested action aborted: local error processing' error message.
This error occurs when Icewarp Email Server is trying to read or write to disk and fails.
The most probable causes of this problem are listed below:
The directories set in the System > Storage > Directories tab do not exist.
The Icewarp service does not have the correct access permissions to the above directories.
A disk drive is full.
Your disk is somehow corrupted.
A user is very close to exceeding the mailbox size limit and he/she tries to send a message via WebMail and save such message to Sent folder.