Issue Summary

Since the DMARC for Opsgenie domain is set to strict, DKIM is failing due to SRS forwarding. With SRS, the envelope sender domain is rewritten to match the forwarding server's domain. This passes SPF, but can cause the DKIM signature to break, because the message headers are modified by the forwarding server. 

Actual Results

Emails are being flagged as spam.

Workaround

Currently there is no known workaround for this behaviour. A workaround will be added here when available