When we send bounce attachment or do not contains security purpose so after sending a message showing "Warning! Swiftmailer not working. An error has occurred while sending emails!"

[komal-sh-27]

Description
When we send bounce attachment or do not contains security purpose so after sending a message showing "Warning! Swiftmailer not working. An error has occurred while sending emails!"

How to reproduce
Step 1: Go to admin or customer side and click on the tickets option now reply with an attachment (bounce or not contains security purpose)

Step 2: Now reply and here show like this:

Possible Solution
If we are sending bounce attachments or do not contain security purposes so after sending a message should be shown the meaning full message like this: This message was blocked because its content presents a potential security issue so unable to deliver email
instead of this "Warning! Swiftmailer not working. An error has occurred while sending emails!"