|Issue||When processing subscription jobs on an AWS EC2 instance of Tableau Server, the job may periodically fail to run, generating the error "com.tableausoftware.model.workgroup.util.EmailHelper - SMTP host <AWS SMTP server> (port 25) is unreachable. Cannot send email"|
Contact Amazon AWS Support for assistance on how to remove the throttle on port 25.
For more information, please see the following article: https://aws.amazon.com/premiumsupport/knowledge-center/ec2-port-25-throttle/
|Root Cause||Per Amazon AWS support: "In order to maintain the quality of Amazon EC2 addresses for sending email, we enforce default limits on the amount of email on port 25 that can be sent from EC2 accounts."|
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