Mails are bouncing

Out of 8 reports 4-5 are sending rest are bouncing.

I am using send outlook mail message

@Manju_Reddy_Kanughula,

This issue because of your mailbox size.

Log into Outlook on the web and clear out old mail - start with deleted items then work on other folders if you can’t get it low enough.

  1. Empty the recovery folder linked at the top of the Deleted items folder. (The recovery folder has a different, smaller quota, but emptying it can help speed up the processes.)
  2. Sort the deleted items folder by size and delete the largest messages - select the first, scroll down and hold Shift as you select another message. Then hit Delete.
  3. Empty the recovery folder again.
  4. Click the Empty Folder button.
  5. Go do something else for a couple of hours, more if you have a lot of deleted mail.

Some people prefer to repeat step 2 to clear the Deleted items folder. If you do this, do step 3 every few thousand messages.

@Manju_Reddy_Kanughula ,
if it is shared to some ids, then probably you should check and confirm that the mail ids provided is correct, no extr added spaces in between

Also are you sharing the mail in a loop or At once for multiple email ids?