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MAILCONSMTP - Outgoing Email Rejected by SMTP Server

Fix this error by verifying the sender address and confirming ServiceOps has SMTP relay authorization.

MAILCONSMTP appears when the SMTP server accepts the connection but rejects the outgoing message. This means the connection itself works, but the sender address or relay authorization is the problem. Use this page to confirm the sender is valid and authorized to send through this SMTP server.

Error CodeMAILCONSMTP
Error MessageOutgoing email was rejected by the SMTP server. Check the sender address and all settings.
SeverityMedium
AffectsOutgoing Email Servers

Symptoms​

Look for these signs to confirm this error is active.

  • The connection to the SMTP server succeeds, but outgoing emails fail to send.
  • The error indicates the message itself was rejected, not the connection.

Root Cause​

One of these conditions caused the SMTP server to reject the message.

  • The SMTP server connected successfully but rejected the outgoing message.
  • The sender email address isn't authorized to send through this SMTP server.

Resolution​

Follow these steps to confirm the sender address is authorized.

  1. Verify the email address configured on the outgoing server is valid and active.
  2. Contact your IT or mail administrator to confirm ServiceOps is authorized to send emails through this SMTP server.
Related FAQs

See Email Server FAQs for: "Why are all outgoing emails failing with a connection error?" and "Why does the outgoing server fail with 'configuration is not proper or recipients list is empty'?"