Comment by bityard

If it's a new domain, then your problem isn't reputation exactly, it's having a newly-registered domain. Buying a new domain, setting up the SPF, DKIM, and MARC, and then immediately spamming from it until it's banned everywhere a week later is standard spammer MO.

I've been self-hosting mail for me and my family for about 20 years and don't send nearly enough mail to have a "reputation" with anybody. Still, I don't have any problems with deliverability of mail.