Address Types

E-mail addresses in MAPI are defined by two properties. The address type, PR_ADDRTYPE, is a string property that names the messaging system the address is destined for. It is used by MAPI to assign responsibility for an e-mail address to the right transport provider. The e-mail address itself, PR_EMAIL_ADDRESS, is another string whose format varies depending upon PR_ADDRTYPE. It is not interpreted by MAPI, but by the transport provider and by the messaging system itself.

This appendix lists address types known to MAPI at this time and the corresponding e-mail address formats. Several of these address types, including SMTP, X400, and FAX are used by a large number of messaging systems. It is important that all MAPI components agree on the type name and address format for such common types, so they can interoperate smoothly. MAPI address book providers, MAPI transport providers, and gateways to messaging systems with MAPI-based clients should all take note of this specification.

To define a new address type, to make comments or suggestions about the information in this appendix, or to request more information, send e-mail to mapi@microsoft.com. The following table, and many of the address type specifications that follow, are work in progress.