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.
$Â 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."Â