Use a transport map for sites that don't grok VERP-style sender
addresses, and use smtp_generic_maps to strip off the VERP portion.
UNTESTED example:
/etc/postfix/master.cf:
# NO WHITESPACE in name=value
smtp-no-verp unix - - n - - smtp
-o smtp_generic_maps=pcre:/etc/postfix/no-verp.pcre
/etc/postfix/main.cf:
transport_maps = hash:/etc/postfix/transport
/etc/postfix/transport:
example.com smtp-no-verp:
/etc/postfix/no-verp.pcre:
/^([^+]+).*(@example\.net)$/ $1$2
The tricky part is the PCRE pattern. Except for "example" and "net",
everything else must remain unchanged.
Wietse
