I need a Linux email expert to set up and teach me how to set up an email server. Here's our setup:
We have an Debian Linux with postfix.
We can send a mail using our domain, but they almost always go to spam. But the DNS was manager by cpanel on OVH hoster.
SPF seems ok
But Sender ID and DKIM seems not work
Please only accept this job if you are comfortable in working this way. Think of this as pair programming or rather "pair system administration". My timezone is France/Paris (+1)