Unable to send email from email account

we have multiple email accounts from which we assigned same email profile to 2 email ids
one id is smoothly sending and receiving emails but another email account cannot send the email if from any document like quote or lead if we draft email its status is sending all the times
as shown below

In GMail there’s have such things as

Maybe that one email that not sent, require like “Less secure app access” in your mail setting to be on.

Problem Solved we resetted the hosting server
and deleted the email account of the user and recreated