The honest answer: it's hard, and here's why
"I host my website, why not my email?" is one of the most frequent questions our support gets. The short answer: because outbound mail is the most distrusted service on the Internet. But with method, it works — some of our customers have done it for years.
IP reputation: your digital criminal record
The big receivers (Gmail, Outlook, Yahoo) score every sending IP address. A fresh IP starts at zero — and an IP previously used for spam starts below zero. Low-cost hosting ranges are often pre-listed in filters, because they harbor botnets.
Our ranges are clean and monitored — we expel spammers, literally — but even a clean IP must be warmed up: start with a few dozen emails a day, then ramp up progressively over 4 to 6 weeks.
The authentication trio: SPF, DKIM, DMARC
Without these three DNS records, you don't exist:
; SPF: who is allowed to send for this domain
@ IN TXT "v=spf1 mx -all"
; DKIM: cryptographic message signature
default._domainkey IN TXT "v=DKIM1; k=rsa; p=MIIBIjANBgkq..."
; DMARC: policy on failure + reports
_dmarc IN TXT "v=DMARC1; p=quarantine; rua=mailto:[email protected]"Start DMARC at p=none, read the reports for two weeks, then tighten to quarantine and finally reject.
PTR: the detail that blocks everything
Your IP's reverse DNS must resolve to your hostname, and that hostname must resolve back to the same IP (FCrDNS). Gmail rejects without it, period. With us, the PTR is configured from the customer panel in thirty seconds — that's not true everywhere, and it's often where mail server projects die.
Port 25, the other wall
Many providers block outbound port 25 by default. We open it on request after a quick check — our compromise between fighting spam and the freedom to host your own mail.
Doing it anyway: the pragmatic path
- Mailcow or Mail-in-a-Box: complete, maintained stacks. Don't start from a bare Postfix unless the sport is what interests you.
- A VPS dedicated to mail: isolate the service, its IP, and its reputation from the rest of your infrastructure.
- A fallback relay for critical transactional mail (invoices, password resets): mixing newsletters and transactional mail on the same IP is a professional foul.
- Blacklist monitoring: sign up for Google Postmaster Tools and watch the RBLs every week.
Our position
If email is your core business, a specialized operator remains rational. If you want sovereignty, privacy, or simply to learn, it's entirely doable on a VPS: budget a weekend for setup and an hour of monthly maintenance. Our engineers know the subject — open a ticket if Gmail snubs you.