folder-hook to archive old messages problem

[Raphael Brunner <lilo-@xxxxxx>]

Hi Users

I use the follow hook to tag old messages and save it to a
archive-folder:

folder-hook =051-Sent-Mail          
'push<tag-pattern>~r>12m!~F<enter><tag-prefix><save-message>+052-Sent-Archive<enter><sync-mailbox>'

Now, the problem is, if there's no message to move to this folder
(because today is'nt any new message >12m), then, if I leave the folder,
mutt save just the message on top. And this message is from today! Then,
mutt ignore the date and save at least one message. And this should'nt
be!

Now, my question: Is there a simply way to solve my problem or maybe
someone want the same 'idea' behind and has a working solution?

Thank you for any idea/help!

greetings, raphael