Best secure mail server on Linux?

Question

linux

Which mail server do you recommend based on Linux to be a professional solution, who has experience waiting for your valuable advice, Thanks

Answer 1

The choice of only two options exim (60+% of all mail servers in the world), postfix (30+%).
Vulnerabilities are more commonly found in Exim.
But you have already been told correctly - you need to find postmaster-a and he will put the option that he is more familiar with.
Self-configuring the mail server (exim/postfix+dovecot+sieve+
spamassassin+clamav+dkim+
dmarc+spf+ptr+mx+tls+
mta-sts+tlsa dane+bimi) will only lead to a quick hit of ip in all blacklists and all mailings in spam.

Answer 2

Professional solution: any stable mail server + a person who understands it well enough. It is even worth starting, perhaps, from the second.

Answer 3

it would be nice to determine why you need a mail server and what you expect from it.
exim+postfix and so on, for example, it's only about receiving and sending messages, but not about webmail/calendars/tasks/shared address books/contacts/integration with LDAP, etc.
Is this functionality needed?
Do you really have everything so secret and important that connect.yandex.ru, google apps, zoho mail are not for you?
Decide on the tasks and then the range of solutions suitable for you will decrease significantly, and then it will not be so difficult to find a contractor.

Answer 4

Kerio conntect, friendly interface, built-in spam filters that can be disabled from the main sites, custom attachment filters, white and black lists of incoming

Answer 5

The mail server needs constant supervision. It is not enough to take it and fully configure it. You need to constantly monitor it, otherwise you will get into a lot of problems.
However, setting up a mail server in a human way is not a trivial task. This is a long and tedious task. And if you take into account that attacks on the mailer never stop, then...
Do you need it?
Maybe it's easier to follow the beaten path (not kosher) and sit down on yandex or a similar service?
For example, after 6 years of maintaining a mail server, I spat and dragged it to yandex.

Answer 6

A little offtopic. But somehow the bank of Russia decided to switch to postfix from exchange and it was 3 times in my memory.
I took part in this mess. Therefore, I will advise.
* Outlook connector
* Calendars
* backups and quotas
* antivirus that is normal
* antispam and white black gray sheets