The delivery format to use for sending outgoing e-mail using the Simple Mail Transport Protocol (SMTP).
Assembly: System (in System.dll)
A delivery format where non-ASCII characters in the envelope and header fields used in the Simple Mail Transport Protocol (SMTP) for mail messages are encoded with UTF-8 characters.
The extensions to support international e-mail are defined in IETF RFC 6530, 6531, and 6532.
A delivery format using 7-bit ASCII.
The traditional delivery format used in the Simple Mail Transport Protocol (SMTP) for mail messages.
Available since 4.5