Bring your own mailboxes
Connect Gmail, Microsoft 365, or any SMTP/IMAP mailbox. Coordinate sends across a pool with weighted rotation.
Everything you need to send
safely and at scale.
One deliverability-first engine: connect your mailboxes, warm them up, protect their reputation, and measure what humans actually do.
Warm-up network
Warm-up-enabled mailboxes exchange real, labeled messages and replies across the Sendvanta warm-up network, building genuine sending and receiving history. Volume ramps automatically while each mailbox stays healthy — even a single mailbox can warm up.
Layered health scoring
Separate reputation for mailbox, sending domain, DKIM domain, and IP — scored over 7- and 30-day windows with automatic slow-downs.
Human-verified engagement
Bot-aware open, click, and verified-visit tracking so you can tell real interest from security-scanner noise.
Email verification
Verify lead addresses against live mail servers before a campaign goes out. Invalid, disabled, catch-all, and role addresses are flagged in your lead lists, and verified-invalid addresses are automatically blocked from ever being sent to — cutting bounces before they hurt your reputation. Credits included on every paid plan.
Built-in spam-score check
Score any draft with SpamAssassin before you send. A clear meter shows how likely it is to be filtered and which rules would trip — so you fix it in the editor, not in the spam folder.
Multi-step sequences
Rich-text emails with variables and fallbacks, thread-aware follow-ups, and send windows in the recipient's timezone.
Stops on reply
Replies, bounces, and unsubscribes stop the sequence and suppress the address automatically — no accidental follow-ups.
AI copywriting
Draft a full sequence from a short brief, or write and rewrite any single step — always scoped to your campaign. Included on every paid plan.
AI copy variations
Each send goes out as one of several AI-written rephrasings of your email, so high-volume campaigns never land as byte-identical copy — an easy spam-filter fingerprint. Template variables and unsubscribe links are always preserved. Included on every paid plan.
Deliverability tooling
SPF / DKIM / DMARC checks that catch the real failures — lookup limits, weak policies, regressions — plus one-click unsubscribe compliance, spam-complaint feedback loops, classified provider errors, and seed-inbox placement tracking.
Deliverability alerts
When a mailbox is auto-paused, volume is reduced, a DNS check regresses, or a recipient marks you as spam, the workspace is alerted in-app and by email — you hear it from Sendvanta before you hear it from Google.