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SMTP Mail Service is not working in AEM 6.4 (Service pack 7) - Invalid mail service configuration

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We are trying to send email from an AEM Service using MessageGatewayService API. The weird part is, it is working on all lower environment and including in our local aem instance but it is not working only in Live servers. We verified the below things

  • Verified smtpMailService service (/system/console/jmx/, it says “The E-mail Service appears to be working properly. Verify the health check e-mail was sent to [ ]
  • Verified that the smtp host is open with port number using telnet from both author and publish servers
  • Restarted Day Communique 5 Mailer bundle

Error Message:- Invalid mail service configuration.




Is there any additional configuration to verify?


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1 Reply

The error says invalid mail service configuration which means either hostname, user/pass, etc. is not configured or read properly. If possible, check line #270 of and that's the rootcause. Compare the configurations of your sandbox vs this server.


And do a “Refresh Package Import” of "" bundle and see if that helps.