I have the same issue. In my case I am backuing up a linux mail server (Unbuntu 18.04) with postfix and dovecot. The serversoftware stores most of the mail datafiles with a ‘:’ in the filename.
Excluding the files is not an option.
The status mail from urbackup contains thousands of those warnings.
Do I have a chance to supress those kinds of warnings? As far as I have seen, urbackup handles backups and restores correctly (filnames are changed back upon restore, which is fine !)
Do I have a chance to modify the backup log before it is sent out via email?
I am running urbackup UrBackup Server 2.4.12 Rev. 487a3c7747 on Microsoft Windows 10 Pro (build 18363), 64-Bit.
Any help would be greatly appreciated.