Hello folks,
While sending an email if you received below error then follow the mentioned solution:
QuoteSMTP Protocol Returned a permanent error 552 Message size exceeds fixed maximum message size of 2097152 bytes
This error says that you have exceeded the message size which means there is an attachment in your mail and your SMTP server does not allow you the cross the limit of attachment file. To fix this error you need to increase the SMTP outbound attachment limit.
That's it. Enjoy ..!! :) ;) :)