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[Mailer] Remove bcc for signed messages #18013

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Mar 7, 2023
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[Mailer] Remove bcc for signed messages #18013

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6 changes: 6 additions & 0 deletions mailer.rst
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Expand Up @@ -1043,6 +1043,12 @@ using for example OpenSSL or obtained at an official Certificate Authority (CA).
The email recipient must have the CA certificate in the list of trusted issuers
in order to verify the signature.

.. caution::

If you use message signature, sending to ``Bcc`` will be removed from the
message. If you need to send a message to multiple recipients, you need
to compute a new signature for each recipient.

S/MIME Signer
.............

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