I found a few incorrect limitations in GAIA.
1. The email address can't handle a + sign. It is a valid character in the account name as many servers allow it to distinguish between multiple uses of the same account.
2. The backslash is not allowed in a crontab entry. But in some cases you need it. For example I like to keep the local backups in check with:
/bin/find /var/log/CPbackup/backups/ -ctime +7 -exec rm {} \;
But the backslash is not accepted in GAIA.
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