Everything you need to land in the inbox

Automated warming, deliverability testing, and reputation tracking — all in one platform, all included in every plan.

Core Features

The foundation of successful email deliverability.

Automated Email Warming

Connect your email and our system handles everything automatically — sending, receiving, opening, and replying to build your sender reputation naturally over time.

Smart Ramp-Up Controls

Start with low daily volumes and gradually increase. Our smart ramp-up mimics natural email behavior so providers never flag your account for sudden spikes.

Real-Time Reputation Dashboard

Track your sender reputation score, daily email activity, delivery rates, and engagement metrics — all from a single real-time dashboard.

Custom Template Testing

Send your actual email templates to our test mailboxes and instantly see inbox vs. spam placement, SPF/DKIM/DMARC analysis, spam confidence scores, and blacklist checks.

Enterprise Security Filters

Our test pool runs behind Proofpoint and Microsoft Exchange Online Protection. If your email passes these enterprise-grade filters, it will reach real inboxes.

Blacklist Monitoring

Every deliverability test includes a multi-source DNS blacklist check across major block lists. Know immediately if your domain or IP has been flagged.

How email warming works

A simple, automated process to build your sender reputation.

1

Connect

Link your email account via OAuth or SMTP credentials. Takes under a minute.

2

Warm

Our system sends and receives emails between your account and our warming pool automatically.

3

Engage

Pool accounts open, star, and reply to your emails — generating positive engagement signals.

4

Deliver

Email providers see consistent positive activity and trust your domain. Inbox placement improves.

Advanced Capabilities

Powerful tools included in every plan at no extra cost.

Full Header Analysis

Inspect SPF, DKIM, DMARC, CompAuth results, SCL/BCL spam scores, and Proofpoint indicators — everything email security systems use to evaluate your messages.

Automatic Engagement

Pool accounts automatically open, star, and reply to your warming emails — generating the positive engagement signals that providers look for.

Multi-Provider Support

Connect Google Workspace, Microsoft Exchange, or any SMTP/IMAP provider. Warm up accounts from Gmail, Outlook, Yahoo, SendGrid, Mailgun, and more.

No Feature Gating

Every plan includes full access to deliverability testing, blacklist monitoring, header analysis, and reputation tracking. No paid upgrades for core features.

Works with your email provider

Connect via OAuth or SMTP/IMAP — we support all major platforms.

Google Workspace
Microsoft Exchange
Y!Yahoo Mail
AWSAWS SES
SendGrid
Mailgun
Any SMTP

Included in every plan

No tiers, no add-ons, no feature gating.

Automated email warming
Gradual ramp-up controls
Real-time reputation dashboard
Custom template testing
SPF / DKIM / DMARC analysis
Blacklist monitoring
Proofpoint quarantine checks
Spam confidence scoring
Full email header analysis
Multi-provider support
Cancel anytime

Ready to hit the inbox?

Join Mailsim today. Set up in minutes, start warming immediately.

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