Maildoso

High volume SMTP and Google mailbox provisioning at the low end of the price range.

Shared IPs. Pre-warmed inboxes on most plans. Quarterly or annual billing, no free trial.

SMTP relay. SMTP mailbox and relay infrastructure for high-volume outbound email.

Google Workspace. Official Google Workspace mailbox provisioning for outbound sending.

Shared IPs. .

Pre-warmup. Pre-warmed inboxes on most plans.

Billing. Quarterly or annual billing, no free trial.

From ~$0.49/mailbox/mo. Confirm current pricing on the vendor site.