2 of 2 people found this helpful
Have the same issue after upgrading to 2018.3.0 on all ports 25, 465 & 587. Currently have a support case open.
The only option which worked was using the google restricted SMTP server "aspmx.l.google.com" on Port 25, as this does not rely on TLS. This is not a workable solution though as it will only send emails to Gmail or G-Suite users.
Having this same issue with GMAIL, as well as with Office365. When using port 465 error is cannot reach smtp port = -1; when using port 587 error is must issue starttls command. Cannot locate option for starttls
3 of 3 people found this helpful
Working with Tableau Support we ran the following script which appears to have fixed our issue for now. They did warn that this isn't officially supported and could break with future releases.
"TSM configuration set -k svcmonitor.notification.smtp.ssl_enabled -v true"
The comment worked but we have to run Tsm pending-changes apply command after that
Is it necessary to configure SSL for Tableau Server to send the subscriptions mail from gmail .Please respond on this issue.
I already have svcmonitor.notification.smtp.ssl_enabled set to true, but still cannot connect to SMTPS on 465. Can send an email from the same machine from the command line following this: Using the Command Line to Send Email Through the Amazon SES SMTP Interface - Amazon Simple Email Service so must be something on Tableau server that doesn't work.
Changed to 587 and it works.
Unfortunately, Tableau Server cannot use SSL with SMTP email servers. That is changing with a future release but I cannot advise which release yet. Tableau Server has never supported TLS or SSL when sending subscription notices. If your email server is SSL or TLS enabled, then you have to setup a proxy email server as an interim step. You install any open source SMTP server directly on Tableau Server and you set that up so it exchanges messages with Tableau Server unencrypted. Next you configure that proxy email server to resend all messages to your email server using SSL/TLS. Keep and eye on our prerelease site when we release a version that support SSL/TLS for SMTP connections.
See the notation on the Tableau Server CLI listing of installation options where it states encrypted messages are not supported officially:
This is likely to change with a future version post 2019.3 so stay tuned to http://prerelease.tableau.com