all:
driver = accept
address_data = ${if match{$local_part}{^(.)}{$1}}
- transport = ${if match{$local_part}{^.*-(.*)\$}{$1}fail}
+ transport = ${if eq {${substr_-1_1:$local_part}}{1} {t1} \
+ {${if eq {${substr_-1_1:$local_part}}{2} {t2} \
+ {${if eq {${substr_-1_1:$local_part}}{3} {t3} {t4}}}}}}
# ----- Transports -----