"554 5.7.1 <> Sender address rejected: Access denied" is shown in /var/log/maillog file.
Issue
- "554 5.7.1 <>: Sender address rejected: Access denied" is shown in /var/log/maillog file.
- The envelope from is <> causing the email to be discarded based on
smtpd_sender_restrictionssetting. How to modify thesmtpd_sender_restrictions's so that the relay server can send NDR (Non-Delivery Report) emails to external recipients.
Environment
- Red Hat Enterprise Linux
- postfix
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