EmailUndelivered Mail Returned to Sender

[sonalin]

I have designed a Flow that process a new inbound email and sends a autoreply to the user. The Email logs shows the email is in sent-ready state and even sent however the Email logs shows a new entry of subject as EmailUndelivered Mail Returned to Sender with Error string: "Email set to ignored because of disallowed from address, email_address_filter_reason = Missing final '@domain'".

I am not able to understand this missing parameter, Could some one please assist me to resolve this issue.

The flow only is failing on the Production instance and on the non-production instance it is working.

Thanks,

Sonali.

[jaheerhattiwale]

@sonalin Please check the email address to which you are sending mail. The error states that the email address is wrong.

Please mark as correct answer if this solves your issue. 

[Wyatt Fudal1]

@sonalin I'm running into a similar issue. Did you find a solution to your problem?