Configure Exim (Postfix) + SPF + DMARC + DKIM
Настройка ПО и серверов
Configure Exim (Postfix) + SPF + DMARC + DKIM on VPS (Hosting) without panel and with panel
Example test mail message https://www.mail-tester.com/test-2xluo
Example test mail message https://www.mail-tester.com/test-2xluo