[Mpk-09-general] Undeliverable mail: Courier was unable to deliver the parcel, ID49987629557

Failed to deliver to '[email protected]' SMTP module(domain ottawacatholicschools.ca) reports: message text rejected by aspmx.l.google.com: 552 5.7.0 message content and attachment content guidelines. j28si11223444otd.64 - gsmtp