Using CC Custom mail filter recipe does not work with single recipient

[Azimuth]

When we have a mailbox that we want to receive a copy of messages to another recipient, we use CC rules to achieve this.
here's an example: Alerts@domain.com should deliver a copy of the message to me@domain.com
so in the alerts mailbox under custom rules we put:
cc "!me@domain.com"

this rule does not work unless there are at least 2 recipients in the custom rules box. ie:
cc "!me@domain.com"
cc "!onemore@domain.com"

has anyone experienced this?

[till]

Maybe its a problem with a missing newline at the end. If you have two recipients, do both recipients receive a copy or only the first one?

[Azimuth]

both receive a copy.
I also assumed this and tested single recipient with extra returns at the end.
additionally, adding the single recipient twice does not resolve the problem.
The setup is a pretty standard Ubuntu 10.04 x64 with courier setup.

[till]

Thats strange indeed. You might want to take a look into the .mailfilter file for the user which is in /var/vmail/mailfilters/...... if there is anything that looks not normal when only one recipient is added. You can try to add a newline in that file manually as it might be that the newline at the end gets stripped out by ispconfig when the file gets written.

[Azimuth]

Very strange. the .Mailfilter files look pretty much the same.
FYI extra blank lines are not filtered out by ISPCONFIG.
I added a second recipient, then removed the second recipient and now it's working with single recipient.