Antivirus and spam filter option

why adding the mail domain, i can’t see the antivirus and spam filter option in hestiacp.
in all the videos i watched i could see them but in my hestiacp i could
i proceed to complete all other process but the cant neither send nor receive mail
i have tried installing but to no avail, please can some help

Probally not Spamassing / Clam AV installed due to less memory… Requires as least 3 gb .,

thank you very much
i understand now
so if i use the SMTP relay also wont it work?