Hi,
I will configure email server and implement all mailing techniques like spf,dkim,ip rotation etc. for good inbox delivery.
Email server security:-
SPF/DKIM installation
RDNS creation
Open Relay Disable
Exim mail server security tweaks
Clam AV Anti virus for virus scan
SMTP authentication
Enable SURBL
Maintain local IP blacklists
Encrypt POP3 and IMAP authentication
I will implement as below mailing techniques:-
Ip rotation -> Prevent blacklisting
Spf ,domain keys enabled-> Increase inbox delivery
Reverse dns enabled -> Increase inbox delivery
Open relay disabled -> For mailing server security
DMARC enabled-> For mailing server security
Thank you