More than 5000 access control reject one day

[cuongtl]

Recently on fortimail, one day i see about more 5000 access control reject from 1000 external IPs. Can someone give me an advice to block these IPs on fortigate automatic?

Thanks!

[Marco]

Hi cuongtl

are these smtp-auth error messages? If you don't need smtp-auth, you can disable it system-wide. enter the following commands in the console:

config system mailserver set smtp-auth disable set smtp-auth-over-tls disable set smtp-auth-smtps disable end