SMTP Senpai
SMTP Senpai is MailSenpai's EU-hosted SMTP relay and REST email API for password resets, order confirmations, notifications and website forms. Connect via SMTP on port 2525 or 587 with STARTTLS, the REST API, or a form endpoint for static sites. DKIM signing uses your verified sender domain, with SPF/DKIM/DMARC checks and automatic suppression of bounced addresses. The permanent free plan includes 5,000 emails per calendar month, up to 200 per day and 30 in the preceding hour, one verified sender domain and 7-day sending logs. No card or expiry. Paid annual plans start at EUR 12.90 per month plus VAT for 10,000 emails per month and 90-day logs. An email report is sent weekly on Monday. Official WordPress and Drupal plugins and open-source SDKs support integration. Written support is available in English and Italian. MailSenpai is the separate newsletter and email marketing platform.
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Suped
Suped is a DMARC monitoring platform that helps startups and enterprises secure their email. We provide clear analytics, instant threat alerts for spoofing attempts, and step-by-step guidance to strengthen your domain's security. Stop phishing, improve your domain reputation, and make sure your emails hit the inbox every time.
DMARC Report Analysis: Automatically processes complex aggregate (RUA) and forensic (RUF) reports into a simple dashboard.
Real-Time Threat Alerts: Instant notifications for potential domain spoofing and phishing attempts.
Guided Policy Enforcement: Step-by-step guidance to safely strengthen your DMARC policy to p=reject without blocking legitimate email.
SPF & DKIM Monitoring: Track authentication alignment across all your sending services to diagnose delivery issues.
Domain Health Score: At-a-glance score based on your compliance, reputation, and blocklist status.
Unlimited Domains: Monitor DMARC for all your domains from a single account.
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WillItInbox
WillItInbox is an email deliverability and validation platform for SaaS teams, developers, agencies, marketers, and newsletter operators that depend on outbound email.
Teams can generate a unique test inbox, send a real message from their app or ESP, and receive a practical deliverability report across SPF, DKIM, DMARC, BIMI, DNS, reverse DNS, blocklists, TLS, headers, content, links, reputation, and sender infrastructure.
WillItInbox also validates individual emails and bulk CSV lists using syntax, DNS/MX, disposable, role, typo, provider, catch-all, SMTP, suppression, and confidence signals. It includes domain monitoring, DMARC report analysis, sending source visibility, provider reputation checks, API keys, webhooks, scheduled checks, incident diagnostics, inbox placement checks, team workspaces, and exportable reports.
Paid plans start at $39/month. PAYG credits are available for extra email validation and deliverability testing usage.
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