5.3 version and email problem

Hello
I appreciate if someone can help me to solve a problem that occur in 5.3 version only after upgrade from 5.2 with gmail notification error

message Nullpointer exception(...<smtpmailmanager:73<.*106<*.98<notiicationmail:44<notificationresource96<...)

I take the same error ,message with clean 5.3 nstallation ,what im doing wrong?

You should enable full stack traces and also provide your config.

thank you for quick response i search google to find how can i enable full stack traces and i will be back with reports and config