How to get original recipient from Postfix when using LMTP?

[MRob via dovecot]

Many people prefer to use LMTP for delivery from postfix for better 
efficiency but X-Original-to header support still missing after many 
years. One affect of this is need to set 
sieve_vacation_dont_check_recipient = yes which violate Sieve standard 
and cause auto-replyies sent to messages that should not happen. Or 
abandon LMTP. or abandon postfix??

So while feature request is stalled are there any realistic workarounds?