Error: "554 5.7.1 Rejected message by MTA, EHLO domain does not exist in DNS"
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Article ID: 171602
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Updated On:
Products
Messaging Gateway
Issue/Introduction
Messaging Gateway is unable to deliver messages to one or more destination domains. Message audit logs for the failed email delivery shows the following SMTP response from the destination mail server:
554 5.7.1 Rejected message by MTA, EHLO domain does not exist in DNS
Environment
Messaging Gateway: All versions
Cause
The hostname presented in the SMTP EHLO greeting does not have a valid 'A', 'AAAA', or 'MX' entry in the DNS
Resolution
Log into the Control Center as admin.
Go to Administration > Configuration > hostname > SMTP > Advanced Settings > Delivery.
Ensure that the MTA host name value at the top of the page is resolvable in the public DNS to an IP address or matches one of the MX records for the domain