envfrom2srs - rewrites the envelope sender address in view of remailing it

       The program uses /etc/mail/pysrs.cfg, if available:

          [srs]
          secret = 'shhhh!'
          maxage = 8
          hashlength = 8
          fwdomain =  'mydomain.com'
          separator = '='

       Rewrite the email with an SRS encoded version.  fwdomain is used as forward domain.

       WARNING:
          Use only if absolutely necessary.  It is very inefficient and a security risk.

       envfrom2srs - rewrites the envelope sender address in view of remailing it

srs2envtol(1)

       Datum: 2014-03-17

1.0                                                                                               ENVFROM2SRS(1)

envfrom2srs [fwdomain] email