This information is based on the Microsoft Mail for PC Networks gateway to MHS and the SMF 71 specification. It may be incomplete or out of date in certain respects. The custom recipient address is in the following format:
[MHS:User@Host] for a MHS user on MHS host.
– Or –
[MHS:Mailbox@Gateway] for a MSMail user on a MHS gateway
– Or –
[MHS:User@Gateway {Network/Postoffice/Mailbox}] for a MSMail user on MHS gateway/downstream postoffice.
– Or –
[MHS:User@Gateway LocalAddress] for non-MSMail user on MHS gateway (general case).