Receiving error handling emails to Gmail

[Harikanth]

Hi Community, 

I have noticed below error in the atlassian-jira-incoming-mail.log : 

 ERROR [JIRA] Caesium-1-2 anonymous    Jira project emails Jira project emails[10220]: Forwarding email with bulk delivery type.

I am receiving below Email, Can someone help me about this issue ?

Gmail subject contains :  Fwd: [JIRA] EMAIL HANDLER: Error handling: 'Delivery Status Notification (Delay)' 

This is an automated email from the issue creation service at "Baseurl".

An error was encountered whilst handling messages from the mail server
"JIRA" using the handler "class com.atlassian.jira.plugins.mail.handlers.CreateOrCommentHandler".

The error was:
------------------------
"Forwarding email with bulk delivery type."
------------------------

The error and the email that caused the error are attached to this email.

If this is a recurring problem, you may wish to contact a system administrator to check the parameters of your mail fetching service:



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This message was sent by Atlassian Jira
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Br,

Hari.