Install BillionMail on aaPanel: Self-Hosted Mail Server & Newsletters

BillionMail is an open-source, self-hosted mail server, newsletter, and email marketing solution developed by aaPanel Build your own mail server and newsletter platform with BillionMail, installed in one click from aaPanel. We start on a fresh VPS, install BillionMail, add a sending domain, set up every DNS record (MX, SPF, DKIM, DMARC and PTR), get a free SSL certificate, send our first newsletter, then test deliverability and fix every problem until the score goes from 89/100 to 95/100 (grade A). Every mistake we hit is in here too, with the fix: Let's Encrypt "connection refused", Postfix saying HELO localhost, a missing PTR record and spam-trigger wording. 📖 Written guides (step by step, with commands): • What is BillionMail? https://adminsforum.com/Thread-guide-... • Install BillionMail on aaPanel: https://adminsforum.com/Thread-guide-... • DNS setup (MX, SPF, DKIM, DMARC, PTR): https://adminsforum.com/Thread-guide-... • SSL and hostname fix: https://adminsforum.com/Thread-guide-... • Send your first newsletter: https://adminsforum.com/Thread-guide-... • Deliverability, test and fix: https://adminsforum.com/Thread-guide-... 📬 Free email deliverability tester used in this video: https://seostacktools.com/email-tester 💬 Stuck? Ask in the aaPanel BillionMail Support forum: https://adminsforum.com/Forum-aapanel... Chapters 0:00 Introduction 0:34 What is BillionMail? 2:05 Before you start (server, domain, port 25) 3:29 Install from aaPanel (Docker one-click) 5:55 Lock down the dashboard 6:37 Add your sending domain 7:23 DNS records: MX, SPF, DKIM, DMARC 9:51 Free SSL and the port 80 fix 11:25 Fix the mail server name (HELO) 12:23 Mailboxes and webmail 13:11 Contacts and lists 14:05 Build a template 15:06 Send your first newsletter 16:46 Read the results 17:26 Test deliverability (89 to 95/100) 20:26 More features: Send API, SMTP relay, queue, logs 21:52 Troubleshooting checklist Tested on BillionMail 4.9.0 with aaPanel, October 2026. #BillionMail #aaPanel #MailServer