Maildoso

Private SMTP mailbox and domain infrastructure for B2B teams scaling outbound sending capacity.

Maildoso registers or connects domains, spins up SMTP mailboxes, and sets SPF, DKIM, and DMARC records without manual DNS work. Mailboxes plug into sequencers such as Instantly, Smartlead, and Saleshandy, with IP rotation and per-mailbox health scoring. Per-mailbox cost falls sharply with volume, and domains are billed separately.