Hello Abdul,
iLo Alert Mail is feature added from iLO4 and above versions.
If you are looking to disable Alert Mail for particular server in enclosure, you can do so from iLO of that server.
- Please refer to page 138 in iLO4 User Guide for procedure to disable this feature (Gen8 and Gen9 Models)
https://support.hpe.com/hpsc/doc/public/display?docId=c03334051
- Please refer to page 290 in iLO5 User Guide to disable this feature in Gen10 models.
https://support.hpe.com/hpsc/doc/public/display?docId=a00018324en_us
I hope this helps you.
Best Regards
Roshan