Hi Karol,

> I am using this:
> /^(Received:) from.*]\).*(.{2}by mail\.nimitz\.pl.*Postfix.*) (with
> [E]{0,1}SMTP[S]{0,1}[A]{0,1}) (.*)/ REPLACE $1 from mail.nimitz.pl
> (localhost [])$2 with SMTP $4
> Just change 'mail.nimitz.pl' with FQDN of your server. This expression
> works for me and also removes information about the connection, which in
> my case can tell if the mail was sent from webmail (unencrypted
> connection from webmail host to postfix host) or client's MUA
> (encrypted).
> It can probably fail on some systems due to .* matching, which is
> greedy, but I wrote it many years ago and it works, so I am not fixing
> it.

Thanks for this.  I’m looking to mask out the DDNS name of a xDSL connection.

I tried the following with a visual regex program (to make checking captures 

   REPLACE $1 [] (localhost []) by myserver.com$2 $3

…however this does not match when Postfix evaluates it.  I am attempting three 

1. Received: from
2. The first part of the date from the ; to the , after the day (eg: “Fri”)
3. The last part of the date from the numerical day number to the end

The reason for the two part handling of the date is I want to strip out 
whitespace between “Day,  6 Apr . . .”.  If I don’t strip this out it puts a 
line break inline in the Received: header that breaks the date over two lines.

Does anyone know what I’m doing wrong and/or is there a way to make Postfix 
provide more debug output for a regexp: operation ?


- J

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