CODEWITHSUNDEEP
ruby-on-railsjsonpostmark
Nick
Nick

Reputation: 9866

Postmark::InvalidMessageError - Received invalid JSON input

I use Postmark for a contact form in a Ruby on Rails app. I'm getting the following error when attempting to send a message:

Postmark::InvalidMessageError
Received invalid JSON input

How can I fix this?

Upvotes: 0

Views: 595

Answers (1)

Nick
Nick

Reputation: 9866

Turns out the cause of this was due to the utf8 hidden field that is automatically generated from Ruby on Rails form helpers. When I removed the following line from my form in Chrome's dev tools, it submits just fine:

<input name="utf8" type="hidden" value="✓">

Part of the reason this caused issues was due to the fact that I was including the full form params hash in the message for debugging purposes. I fixed it by including this in my mailer:

params.delete(:utf8)

Upvotes: 3

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