Hi,
In my organization spam, junk mails and spoofed mails are coming on receive connector as anonymos logon setting is there, it is not affecting to any user mailbox but it stuck in Queues. it causes high memory utilization and queues consume space of disk and also mail flow stops after increasing queues mails.
In that Recipient address and Mail from address is different than my domain.
I want to block those mails on exchange 2013 and I don't have any 3rd party security application for spam blocking.
Im using exchange 2013 Antispam and malware feature for that.
please help to block these mails.