Why we are not receiving the jira tickets through the email handler?

[Santhosh Gosula]

Hello Team,

We have a incoming mail handler configuration in my jira. In the past we are able to receive the tickets through the incoming mail handler. Suddenly we are not receiving tickets while creating tickets through incoming mail handler. Please advise why we are not receiving jira tickets. 

Note: In the mailbox inbox it showing unread after read/open the mail. 

Please find the screenshot for the same.

[Santhosh Gosula]

Hello,

Can anyone suggest on my request?

Thanks in advance!!