Include HTML (Content-Type: text/html) in email destination.

[Sampathreddygopireddy118]

Is your feature request related to a problem? Please describe.
currently email destination only supports (plain/text).

Describe the solution you'd like
It is really good to have the (Content-Type: text/html) in email destination.

Describe alternatives you've considered
Currently I using custom webhook destination for email notification.

[anjanaasok]

@Sampathreddygopireddy118 can you share the custom webhook that you created, How did you pass the context over to webhoook. DO we pass the ctx object in the URL of webhook

[Sampathreddygopireddy118]

I was able to do the HTML format for email using custom webhook (destination as jenkins (generic-webhook-trigger)). Below are the steps if someone wants to do it.
Steps:

Message info in opendistro alerting write your message including painless script and include html tags.
create a free-style jenkins job -> enable the generic webhook trigger-> provide the variable to receive text format from kibana (custom webhook).
enable/create execute shell in Build, and write the incoming text (variable assigned in generic webhook) to a file with html extention (echo $variable > email.html).
enable editable email notification in your post build. Follow the steps from the document below.
https://dzone.com/articles/jenkins-convert-excel-data-to-tabular-format-and-s
Hope this helps. Let me know if you need any other details. My email: [email protected]

[qreshi]

Closing in favor of opensearch-project/notifications#495