SendKit
esp matching

Gmail to Gmail. Outlook to Outlook.

SendKit works out which provider each lead is on and sends from a mailbox on the same one. Gmail to Gmail, Outlook to Outlook, across Yahoo, Apple, and custom domains too.

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SendKit

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Status
Sent / Limit
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Warmup Stats
Warmup
Sending
Alex Johnson
Active
14/50
Cold Outreach
Day 2122/2591% health
Sarah Mitchell
Active
31/50
Cold Outreach
Day 1819/2587% health
Outreach Pool
Active
5/25
Warming Pool
Day 78/2574% health
Alex (Domain B)
Active
28/50
Cold Outreach
Day 1617/2583% health
Active
42/50
Agency
Day 2424/2594% health
Active
19/50
Cold Outreach
Day 1213/2579% health
Active
37/50
Agency
Day 2021/2588% health
Priya Sharma
Active
8/25
Warming Pool
Day 56/2568% health
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routing features

Right provider, right mailbox, always

Matched to the right sender

Gmail, Outlook, Yahoo, Apple, and custom domains are each identified and routed automatically.

Automatic matching

In auto mode, SendKit routes each email through a sender on the same provider as the recipient.

As hands-off as you want

Off, fully automatic, or your own routing rules. Pick the level of control that fits your workflow.

Better inbox placement

Same-provider delivery improves the chances of landing in primary instead of spam or promotions.

smart routing

Auto-match providers to mailboxes

SendKit detects the recipient's ESP

SendKit identifies whether your lead is on Gmail, Outlook, Yahoo, Apple, or a custom provider before the send goes out.

Routes through a matching sender

If the lead is on Gmail, SendKit sends from one of your Gmail mailboxes. Outlook leads get Outlook senders. This improves inbox placement.

Choose your mode

Leave it off, let SendKit handle it automatically, or write your own routing rules when you need finer control.

Better Gmail inbox placement

Gmail to Gmail delivery tends to land in primary more often. ESP matching routes your Gmail leads through Gmail senders automatically.

Mixed mailbox campaigns

When you have both Gmail and Outlook mailboxes, ESP matching assigns each lead to the best sender. You don't have to think about it.

Custom routing rules

For advanced setups, define custom rules with priority. Route specific domains through specific mailboxes with full control.

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routing logic

Provider-aware sending, not random relay

Automatic ESP detection and matching

SendKit identifies each recipient's provider and routes through a matching mailbox. Gmail leads get Gmail senders. Outlook leads get Outlook senders. Leave it off, let it run automatically, or write your own rules.

vs Smartlead
SendKit
vs Lemlist
SendKit

Provider detection across every major host

Detection reads the receiving domain's public mail records, so it works on custom domains sitting on Google Workspace or Microsoft 365, not just obvious gmail.com addresses. Matching runs automatically, or you can define your own rules.

frequently asked questions

Got questions? We've got answers.

ESP matching works out which provider each recipient is on, then sends through one of your mailboxes on that same provider. Gmail to Gmail, Outlook to Outlook.

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Set up SendKit's isolated infrastructure and start sending in under 15 minutes.

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