fatal error at Mail Queue Manager

Sometimes you may face this issue WHM >> Email >> Mail Queue Manager >> at the last column if you click for details then you will get the error as 

[a fatal error or timeout occurred while processing this directive] [a fatal error or timeout occurred while processing this directive] [a fatal error or timeout occurred while processing this directive] [a fatal error or timeout occurred while processing this directive]undef error - Out of memory during "large" request for 33558528 bytes, total sbrk() is 205907968 bytes at /usr/local/cpanel/perl/Template/Stash.pm line 161.

In order to get this issue resolved you need to increase "Max cPanel process memory "  in Tweak Setting, increase the limit twice or thrice of the current limit.