we have recently set up a queue with an SMIME Certificate. We can send a signed mail to, and receive signed and encrypted mails from the recipient. But we can't decrypt messages to the recipient. The certificate of the recipient is not for a person or mailbox specifically, but for a Domain. So OTRS doesn't display the certificate in the decryption field, because the address of the recipient doesn't match that in the certificate. Thus address rewriting is necessary.
We were given a document, that explains how address rewriting is done with Outlook. Essentially you put the email-adress of the recipient in the full name Part and the address the certificate is based on in the "to"-field. So the Format becomes something like:
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"email-of-recipient@domain.com" <email-of-certificate@domain.com>
Thanks in advance
Jens