Core Features
Automated warming, deliverability testing, and reputation tracking — all in one platform, all included in every plan.
How Email Warming Works
A simple, automated process to build your sender reputation.
Connect
Link your email account via OAuth or SMTP credentials. Takes under a minute.
Warm
Our system sends and receives emails between your account and our warming pool automatically.
Engage
Pool accounts open, star, and reply to your emails — generating positive engagement signals.
Deliver
Email providers see consistent positive activity and trust your domain. Inbox placement improves.
Average Reputation Score
Email Activity (Last 30 Days)
Real-Time Reputation Dashboard
Watch your sender reputation climb in real time. Mailsim tracks every warming interaction — sends, opens, replies, and inbox placements — and distills it into a single reputation score that tells you exactly where you stand with email providers. Monitor your 30-day email activity trends and see the direct impact of warming on your deliverability.
Smart Weekly Ramp-Up
Don't just blast and hope. Mailsim gradually increases your sending volume week by week — mimicking organic email behavior that inbox providers trust. Set your targets, and our system handles the pacing so you never trigger a spam filter.
Deliverability Testing
Stop guessing where your emails land. Run a one-click test that sends to both Google and Microsoft mailboxes simultaneously. Get instant results showing inbox vs. spam placement, full email header analysis, Exchange spam scoring, and a 65-point DNS blacklist check — all before your campaign goes live.
Custom Template Testing
Test your actual campaign emails — the exact subject lines, content, and formatting you plan to send — against enterprise-grade security filters including Proofpoint and Microsoft Exchange Online Protection. See exactly how your templates perform before reaching real contacts, with detailed quarantine analysis and sender policy evaluation.
MSIM-7KXP4NR2Searches pool mailboxes for emails containing your tracking ID.
During high volume periods, results may take up to 30 minutes.
Works With Your Email Provider
Connect via OAuth or SMTP/IMAP — we support all major platforms.
Included In Every Plan
All features are accessible through every plan.