Maildoso
SMTP mailboxes built for cold email, with self-healing mailboxes and IP rotation, from $0.49/mailbox.
Email Deliverability
30 posts — Sending infrastructure, inbox warm-up, deliverability testing and inbox-placement tools that keep email out of spam.
Infraforge
Private cold email infrastructure with dedicated IPs, multi-IP provisioning and API — from $3–4/mailbox.
Mailforge
Shared-IP cold email infrastructure — hundreds of domains and mailboxes set up in minutes, from $2–3/mailbox.
Primeforge
Google Workspace and Microsoft 365 mailboxes engineered for cold outreach — part of the Forge stack.
Zapmail
US-hosted Google and Microsoft mailboxes for cold email, set up and connected in minutes.
Litemail
Fresh and pre-warmed Google Workspace and Microsoft 365 inboxes for cold email, from $2.50/inbox.
Warmforge
Email warmup and deliverability platform for outbound sales teams
MailerSend
Transactional email sending API for SaaS and development teams
Unspam.email
Email deliverability testing and inbox preview tool
Mailivery
AI-powered email warmup and deliverability platform
Warmup Inbox
Automated email warmup service for cold outbound teams
Mailtrap
Email testing and sending platform for development and marketing teams
TrulyInbox
Email warmup tool for better cold email inbox placement.
Mystrika
Email warmup and deliverability platform for cold outreach teams.
Mailwarm
Email warmup tool that improves inbox placement by building sender reputation automatically.
Lemwarm
Email warmup tool by Lemlist — build sender reputation before launching cold outreach campaigns.
Instantly Warmup
Email warmup and cold outreach platform with built-in deliverability tools for sales teams.
InboxGeek
Email deliverability intelligence platform for monitoring sender reputation and inbox placement.
Inboxally
Email warmup and deliverability improvement service that trains inbox providers to trust your sending domain.
Folderly
Email deliverability platform that analyses, fixes, and monitors your email infrastructure health.
Litmus
Email testing and analytics — preview, test, and optimise every email before you send.
GlockApps
Email deliverability testing — check inbox placement, spam score, and authentication instantly.
Validity
Enterprise email deliverability intelligence — inbox placement, sender reputation, and data quality.
Bouncer
Fast, accurate email verification — clean your list and protect sender reputation.
