Features
A closer look at how each part of Sendqube actually works.
Multi-step campaigns that send from your own mailbox.
Every sequence is a series of steps with its own delay, subject, and body — sent through mailboxes you connect, not a shared pool.
Multi-step sequences
Set a per-step delay, write with merge tags and spintax for variation, and choose same-thread or new-thread follow-ups for each step.
How it worksMicrosoft 365, Gmail, and SMTP
Connect Microsoft 365 or Gmail via OAuth, or bring your own SMTP mailbox on a custom domain — no separate sending infrastructure to manage.
How it worksMailbox rotation
Assign more than one mailbox to a sequence and sends rotate across them automatically, weighted toward whichever mailbox has the most daily volume left — five mailboxes at 50/day gives the sequence 250 sends/day instead of being pinned to one inbox.
How it worksReusable templates
Save a single step or a whole sequence as a template, then clone it straight into a new campaign instead of rebuilding it from scratch.
How it worksThe guardrails that keep sending accounts healthy.
Deliverability problems are easier to prevent than fix. These run in the background on every workspace.
Deliverability Monitor
One dashboard for inbox placement, domain authentication, and mailbox health — pulled from the same live checks their own dedicated pages use, so you don't have to visit three places to see if something's wrong.
How it worksEmail warmup
New mailboxes can exchange real engagement with other Sendqube senders and ramp their daily send volume gradually, instead of jumping straight to full-volume outreach on day one.
How it worksInbox visibility test
Send a tagged test email from any connected mailbox to a network of seed accounts across providers, then see whether it landed in Inbox or Spam — a snapshot of current deliverability before you launch a real campaign.
How it worksBounce tracking
Hard bounces are caught immediately at send time; delayed bounces are detected automatically afterward. Both are tracked per mailbox so reputation risk shows up before it grows.
How it worksPacing & ramp-up
Sending respects working hours and daily per-mailbox limits, and a sequence can be started on a gradual ramp instead of full volume immediately — recommended for new or recently-paused sequences.
How it worksOne place to hold, verify, and organize who you're reaching.
Contacts are shared across the workspace — import once, use across every sequence.
CSV import with dedup
Import contacts from CSV with tags and saved lists; duplicate emails within a workspace are automatically deduplicated on import.
How it worksEmail verification
Verify addresses before sending to catch invalid or risky emails ahead of time, reducing bounce rates on lists you didn't collect through a direct opt-in.
How it worksContact activity timeline
Every email, reply, sequence enrollment, website visit, and AI drafting/review action for a contact is merged into one chronological view — no jumping between reports to piece together the story.
How it worksSee what happens after you hit send.
Engagement data feeds back into prioritization, not just a report you check later.
Open & click tracking
Measure engagement per sequence and per step to see which messages actually land.
How it worksBot vs human filtering
Separate likely automated activity (security scanners, link previews) from likely-human opens and clicks, so engagement numbers reflect real interest.
How it worksWebsite visitor tracking
Connect website visits back to the campaign, contact, and sequence step that drove them, even when a prospect doesn't reply directly.
How it worksCampaign & contact attribution
See which campaigns and contacts are generating real website activity, not just email engagement.
How it worksLead scoring & Sequence Quality Score
Lead scoring prioritizes contacts using outreach and website engagement together; the Sequence Quality Score reviews writing, setup, and mailbox health before you launch.
How it worksLet the workspace react so you don't have to.
The parts of outreach that shouldn't need a human watching them constantly.
Reply detection with auto-pause
Replies are detected automatically and outreach to that contact pauses immediately — no one gets a follow-up after they've already responded.
How it worksWebhooks
Get a signed HTTP callback the moment an email is sent, opened, clicked, or replied to, a sequence finishes, or a contact unsubscribes — build your own automation on top without polling the API.
How it worksAI writing assistant
Get feedback on tone, subject lines, readability, personalization, and spam risk as you write, and see exactly which contact field or custom field each merge tag will pull from before you send. Turn on the AI Email Agent to personalize each email with a contact's job title, company, and industry, and draft replies — every draft lands in AI Drafts for your review, and nothing sends until you approve it. Approving several drafts at once shows a spam-risk check per draft before anything goes out.
How it works