Symptom
When trying to send an e-mail to the ByD tenant, the e-mail is rejected by the tenant and there is a feedback mail from the e-mail service provider which includes the following error code:
'SMTP error, RCPT TO: Host XXX RCPT TO said 550 5.7.1 TLS 1.2+ required by recipient' (XXX represents the tenant which the e-mail is sent to).
Environment
SAP Business ByDesign
Cause
This issue occurs due to the sender domain doesn't send emails via TLS 1.2 or above.
Resolution
Check whether sender domain infra supports TLS 1.2/1.3. If not, upgrade e-mail infra to TLS 1.2/1.3 or change a domain which supports TLS 1.2/1.3.
See Also
Amazon SES and security protocols
https://docs.aws.amazon.com/ses/latest/dg/security-protocols.html#security-ses-to-receiver
Keywords
TLS 1.2./1.3, SMTP error, 550 5.7.1, E-mail Rejected , KBA , AP-RC-OUT , Output Management , Problem