Bernd Nies:
> Hi,
> 
> Is it possible to rewrite an email address that contains invalid characters?
> 
> Example: Rewrite ":u...@domain.com" to "u...@domain.com" -- stripping
> of the leading ":" (colon).
> 
> I read through the Postfix Address Rewriting README  [1] but did not
> find a hint.

Postfix address rewriting is based on table lookup, therefore you
can use any Postfix lookup table for address rewriting.

Documentation:
http://www.postfix.org/pcre_table.html
http://www.postfix.org/canonical.5.html

Example:
/etc/postfix/main.cf:
    canonical_maps = pcre:/etc/postfix.canonical.pcre

/etc/postfix.canonical.pcre
    /^:(....@example\.com)$/    $1

        Wietse

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