Issue Summary

Currently , when admin configured customised email with HTML and set the recipient with more than 400 emails , it may hit the "Failed to send email" error. However , there are no details why was it failed.

From support logs , can verify that it is due to

{"message":"Invalid payload size.","errors":[{"code":"EVENT_SIZE_EXCEED_MAXIMUM","message":"Request payload size of 261697 bytes exceeded maximum payload size of 257024 bytes."}

Steps to Reproduce

1. Create an automation rule with a Send customised email component
2. Configure content with complex HTML
3. Send email to a team/group with more than 400 but less than 500 users

Expected Results

The email is sent

Actual Results

The below error is thrown in the audit log:

"Failed to send email"

Workaround

• Reduce the number of recipients email. ; and
• Split the "Send customised email" action to reduce the request size