Deliverability & Spam Testing

Folderly analyzes inbox placement and DNS setup, boosts sender reputation daily, and monitors mailbox health with real-time alerts via email, Slack, or SMS.

Bouncer verifies email lists in bulk, checks addresses in real time via API, and monitors inbox placement, with pay-as-you-go pricing from $0.002 per check.

Slicey is a managed cold email infrastructure service: pre-warmed Google and Microsoft inboxes set up for you, with deliverability monitoring and swaps.

Mailook checks email deliverability with blacklist scans and SPF, DKIM, and DMARC record inspection, plus shareable reports and actionable fix tips.

Mailivery warms up email accounts with AI-powered real interactions plus spam and blacklist monitoring to improve deliverability, from $29 per month.

Warmforge is an email deliverability platform offering warmup, inbox placement tests, DNS health checks, and expert consulting for outbound senders.

Fyxer AI triages your inbox, drafts replies in your voice, and takes meeting notes in Gmail or Outlook, with plans starting at $22.50 per user monthly.

Scrubby is an email validation service specializing in risky and catch-all addresses, with bounce management, API integrations, and GDPR compliance.

Mailtrap is an email delivery platform with a sending API and SMTP, a testing sandbox, and 24/7 support for developer and product teams, from $9.

MailToaster automates email warmup through a peer-to-peer sending network with DNS checks and detailed reports, starting at $26 per user per month.

GlockApps tests inbox placement across major ISPs and monitors DMARC records and blacklist status, flagging deliverability problems before they escalate.

Breakcold is an AI-native CRM that unifies LinkedIn, email, and WhatsApp threads, enriches contacts, and lets AI agents update pipelines and drafts.

HotHawk is a cold email sequencing platform with evergreen campaigns, a shared reply inbox, automatic routing, and a Google/Microsoft mailbox warmup network.

GMass is a Chrome extension that turns a Gmail account into a mail-merge and cold email platform, adding sequences, tracking, and verification.

Zapmail sells pre-warmed Google and Microsoft mailboxes for fast campaign starts. This review covers real per-mailbox costs, refunds, and IP-origin complaints.

Clean Email sorts mail into smart folders, mass-unsubscribes from unwanted lists, and runs cleanup rules automatically across Gmail, Outlook, and more.

Hexospark combines cold email outreach with a built-in CRM and LinkedIn lead capture, but the Solo plan caps at one inbox and independent reviews are scarce.

Amplemarket bundles B2B contact data, buying signals, multichannel sequencing, and mailbox deliverability into one AI sales platform from $600/month.

Warmbox is an email warmup service using a 35,000-inbox network and human-like interactions to raise deliverability and pull emails out of spam folders.

Mailscale mass-provisions low-cost cold email inboxes with automated DNS setup. This review breaks down real per-mailbox costs and deliverability complaints.

Lightmeter protects cold email deliverability with warmup guarantees, an independent delivery network, inbox placement testing, and address validation.

Verifalia is an email verification service offering list cleaning, a real-time API, AI spam trap detection, and integrations with thousands of tools.

MailMonitor is a deliverability service offering inbox placement audits, real-time reputation tracking, and expert remediation, from $475 one-time.