Outlook

Microsoft 365 Exchange Error Code 5.7.507 – Access denied, rejected by recipient

Microsoft 365 Exchange Error Code 5.7.506 – Access Denied, Bad HELO

Microsoft 365 Exchange Error Code 5.7.505 – Access denied, banned recipient

Microsoft 365 Exchange Error Code 5.7.504 – [[email protected]]: Recipient address rejected: Access denied

Microsoft 365 Exchange Error Code 5.7.503 – Access denied, banned sender

Microsoft 365 Exchange Error Code 5.7.502 – Access denied, banned sender

Microsoft 365 Exchange Error Code 5.7.501 – Access denied, spam abuse detected

Microsoft 365 Exchange Error Code 5.7.325 – certificate-host-mismatch: Remote certificate MUST have a common name or subject alternative name matching the hostname (DANE)

Microsoft 365 Exchange Error Code 5.7.324 – dnssec-invalid: Destination domain returned invalid DNSSEC records

Microsoft 365 Exchange Error Code 5.7.323 – tlsa-invalid: The domain failed DANE validation.

Microsoft 365 Exchange Error Code 5.7.322 – certificate-expired: Destination mail server’s certificate is expired.

Microsoft 365 Exchange Error Code 5.7.321 – starttls-not-supported: Destination mail server must support TLS to receive mail.

Microsoft 365 Exchange Error Code 5.7.25 – Access denied, the sending IPv6 address [2a01:111:f200:2004::240] must have a reverse DNS record

Microsoft 365 Exchange Error Code 5.7.136 – Sender was not authenticated

Microsoft 365 Exchange Error Code 5.7.13 or 135 – Sender was not authenticated for public folder

Microsoft 365 Exchange Error Code 5.7.134 – Sender was not authenticated for mailbox

Microsoft 365 Exchange Error Code 5.7.133 – Sender not authenticated for group

Microsoft 365 Exchange Error Code 5.7.124 – Sender not in allowed-senders list

Microsoft 365 Exchange Error Code 5.7.64 – TenantAttribution; Relay Access Denied

Microsoft 365 Exchange Error Code 5.7.57 – Client was not authenticated to send anonymous mail during MAIL FROM