AX 2009 Alert Emails fail

Our AX 2009 Alert emails started failing yesterday. The job does not fail and there is no logged information.

There has been no changes to our SMTP server. The Batch server service did fail yesterday but was started back quickly.

We’ve not had an email send successfully since the service stopped.

The Alert emails are sent out with a couple of different sent email address and of course numerous to addresses.

Thanks for any help!

i will suggest first look the error which was coming at the time of batchjob failed,

try to send single mail using code to check everything has proepr setup

http://tech.alirazazaidi.com/sending-email-using-x-code-dynamics-ax-2012/

then if it works fine try to set bachtjob again.