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Known issues and how to resolve them
        Igor Balos edited this page Mar 23, 2021 
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    In case you are running into issues with TLS while using the gem, make sure postmark-rails depends on postmark-gem version 1.21.3 or later.
If you run bundle update postmark-rails it will update postmark-gem to latest.
In case that won't work you can run bundle update postmark, though first command should be enough.
You can check out the version of the Postmark gem being used in Gemfile.lock file.
It should be located above postmark-rails.
More details about Postmark TLS update can be found here.
For additional information about the capabilities of the Postmark API, see Postmark Developers Documentation.