inetd.conf

# SRS
127.0.0.1:10001 stream  tcp     nowait  root    /opt/srs/srs-encode.sh  /opt/srs/srs-encode.sh
127.0.0.1:10002 stream  tcp     nowait  root    /opt/srs/srs-decode.sh  /opt/srs/srs-decode.sh

main.cf

# SRS
recipient_canonical_maps = proxy:hash:/etc/postfix/pfix-srs.norewrite, proxy:tcp:127.0.0.1:10002
recipient_canonical_classes = envelope_recipient
sender_canonical_maps = proxy:hash:/etc/postfix/pfix-srs.norewrite, proxy:tcp:127.0.0.1:10001
sender_canonical_classes = envelope_sender

pfix-srs.norewrite

# We want to be shure not to rewrite these
# For vom.tc
[email protected]       [email protected]
[email protected]            [email protected]
[email protected]        [email protected]
# For pinch.vom.tc
[email protected] [email protected]
[email protected]              [email protected]
[email protected]  [email protected]

srs-decode.sh

#!/bin/bash

while read line; do
        email="${line#get }"
        email="$(perl -MURI::Escape -e 'print uri_unescape($ARGV[0]);' "${email}")"
        if [[ "${line}" == "${email}" ]]; then
                echo "400 Empty input"
        else
                unset t_std t_err t_ret
                eval "$( srs --secretfile=/etc/postfix/srs.secrets --reverse "${email}" 2> >(t_err=$(cat); typeset -p t_err) > >(t_std=$(cat); typeset -p t_std); t_ret=$?; typeset -p t_ret )"
                if [[ $t_ret -eq 0 ]]; then
                        echo "200 $(perl -MURI::Escape -e 'print uri_escape($ARGV[0]);' "${t_std}")"
                else
                        echo "500 $(perl -MURI::Escape -e 'print uri_escape($ARGV[0]);' "${t_err}")"
                fi
        fi
done

srs-encode.sh

#!/bin/bash

while read line; do
        email="${line#get }"
        email="$(perl -MURI::Escape -e 'print uri_unescape($ARGV[0]);' "${email}")"
        if [[ "${line}" == "${email}" ]]; then
                echo "400 Empty input"
        else
                unset t_std t_err t_ret
                if [[ "${email}" =~ @(vom\.tc|pinch\.vom\.tc)$ ]]; then
                        t_err="${email}"
                        t_ret=1
                else
                        eval "$( srs --alias=vom.tc --secretfile=/etc/postfix/srs.secrets "${email}" 2> >(t_err=$(cat); typeset -p t_err) > >(t_std=$(cat); typeset -p t_std); t_ret=$?; typeset -p t_ret )"
                fi
                if [[ $t_ret -eq 0 ]]; then
                        echo "200 $(perl -MURI::Escape -e 'print uri_escape($ARGV[0]);' "${t_std}")"
                else
                        echo "500 $(perl -MURI::Escape -e 'print uri_escape($ARGV[0]);' "${t_err}")"
                fi
        fi
done