Hi,
In email, it is possible to impersonate anyone in the To and From headers in Intercom.
It seems that the entire Intercom system relies solely on these headers. In workflows, I can only compare on "recipient email," which turns out to be the To and CC headers.
I would like to be able to compare on the RCPT TO in workflows.
This makes it very challenging to use in multibrand.
$ swaks --server MY_MTA --port 587 --tls\
--auth LOGIN --auth-user $SASL_USER --auth-password $SASL_PASS\
--from bill.gates@microsoft.com\
--to APP_ID@XXXXX.intercom-mail.eu\
--header "To: anybody@hq.intercom.com"\
--header "From: not-just-anybody@hq.intercom.com"\
--header "Subject: Envelope vs To test"\
--body "Hello. The envelope RCPT is Intercom ID, the header To is bogus."