We have a server that needs configuring to send mail.
We will then require you to be available for further changes.
The server needs setting up entirely and you can choose the version of SMTP system you need. It is a Linux box.
You'll need to tell us what settings need doing for DNS as well and we'll implement that.
Setup should include, DKIM, SPF, DMARC and anything else that you feel is necessary.
We will want to connect to this server using SMTP details from our mailing software Interspire.