Migrated my email servers in 20 minutes yesterday from OVH (their MXs does not support IPv6, and Infomaniak was less expensive for basic email hosting), I found the documentation and the diagnostic tools of the DNS zone very clear, was a no brainer to add DKIM, SPF and DMARC (hey generate the records for you, just have to cpy paste in your zone manager and refresh the diagnostic to get a status after propagation), and autodiscovery and autoconfiguration of email clients are a nice bonus !
Overall a great experience, can recommend !