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I use email address suffixes to file emails to different folders. For example, me+suffix@example.com would be filed in folder "suffix". This works, but I would also like to allow for "-" as recipient_delimiter.

My understanding is that postfix allows for multiple separators. I can, for example, write recipient_delimiter = +-

However, this does not work together with dovecot (v.2.2.27 on my system), which allows only for a single delimiter. Therefore I can either use "+" or "-", but not both at the same time.

I now wonder whether there is a possibility in postfix to rewrite a "+" to a "-", or vice versa, before it is handled by dovecot.

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