I've inherited 3 legacy shared servers all running CentOS. We no longer offer any email subscriptions from our servers and have migrated everyone to cloud services. These servers host about 60 WordPress sites each.
Across the 3 servers I have the following services still running;
- Postfix (SMTP)
- Courier (POP3 & IMAP)
- Dovecot (POP3 & IMAP)
- SpamAssassin
- Plesk Milter
These are all production servers.
Can I safely remove these services permanently now? Are there any other considerations?