例文
- Using SMTPUTF8 extended SMTP it is also possible to use non-ASCII characters.
- First defined by RFC 821 in 1982, it was last updated in 2008 with Extended SMTP additions by RFC 5321, which is the protocol in widespread use today.
- With MIME, a message and all its attachments are encapsulated in a single multipart message, with base64 encoding to convert binary into 7-bit ASCII-or on modern mail servers running Extended SMTP, optionally full 8-bit support via the 8BITMIME extension.
