Supported email messages

SmartRelay supports standard RFC 5322 (MIME) inbound email messages, delivered via ESMTP (RFC 5321).


Cc: and Bcc: recipients are not supported. You should send one message to each recipient, including those who would have been classified as Cc: or Bcc:.

Apart from a few exceptions, we do not modify headers. See Email headers for more details.

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SMS Message Requirements