Everything you need to know about dedicated Postfix MTA infrastructure, custom IP warming, DMARC compliance, and unlimited mailbox hosting.
Dedicated MTA Infrastructure
Grapphen Mail is an enterprise cold email and dedicated Postfix MTA infrastructure suite developed by Grapphen LLC in Sheridan, Wyoming. Unlike Google Workspace or Microsoft 365 which charge punitive $6-$18 monthly user fees and strictly throttle outbound cold volume, Grapphen Mail provides private IP pools, custom rDNS, automated email authentication, and unlimited team mailboxes.
Grapphen Mail isolates sending reputations onto dedicated IP addresses paired with automated SPF, DKIM 2048-bit keys, strict DMARC enforcement, and custom MX/rDNS records. Outbound mail queues utilize intelligent adaptive pacing to prevent spam-trigger spikes.
Yes. On dedicated Grapphen Mail tiers, you can host unlimited domains and unlimited recruiter or SDR inboxes without per-seat licensing penalties.
Cold Outreach & Deliverability
Our dedicated MTA automatically throttles volume across newly provisioned IPs, starting with low-volume warm-up sequences and gradually ramping send velocities over a 21-day algorithmic schedule.
Yes. Grapphen Mail natively integrates with Grapphen ATS (https://app.grapphen.com), enabling recruiters to send email drips and candidate follow-ups directly from Kanban candidate profiles.
Users log in to their webmail interface at https://workspace.grapphen.com, while infrastructure plans, docs, and pricing are available at https://grapphenmail.com.
Deploy Your Dedicated Outbound MTA
Speak with an email infrastructure engineer to design your custom IP warm-up strategy.
