Sending marketing emails from shared infrastructure is a recipe for deliverability disaster. Shared IPs are polluted by other users' spammy campaigns, and ESPs like Gmail and Outlook penalize the entire IP range. A dedicated VPS gives you your own IP addresses with a reputation you control from day one.
With root access, you can configure SPF, DKIM, DMARC, and ARC authentication exactly as the receiving servers expect. You set the rDNS (PTR record) to match your sending domain, eliminating one of the most common reasons emails land in spam folders.
AnubizHost does not restrict SMTP ports (25, 465, 587) on our offshore VPS plans. Many mainstream providers block port 25 by default and require you to beg for an exception. We trust our customers to manage their own email infrastructure responsibly.