What software to work with e-mail put on the server?

Question

*nix-like systems

I need server software for unix, similar to gmail and other online mail services, to read and send emails from my server through a browser.

Answer 1

https://bitnami.com/stack/roundcube

Answer 2

it all depends on where the mail service is located. In fact, sending mail is not a difficult task. Search the web for
RFC SMTP - Describes Sending Messages on Port 25
RFC POP/POP3 - Describes the Receive Protocol on Port 110.
The point is that the communication will be unencrypted. But it does not matter if the mail service works only on the local network with the web service, so that the packets do not run out to the global network.
If you want to work with third-party services, then you should read the IMAP RFC. But this is a complicated thing, and therefore it is better to find some ready-made framework for working with mail.
PS: examples of work phpclub.ru/detail/article/mail

Answer 3

except for zimbra, in my opinion, there is nothing free