Sends at a pace inboxes trust.

Limits per mailbox, not per campaign

Each mailbox has a daily and an hourly limit and a minimum gap between sends. The limits count every campaign the mailbox is in, so running three campaigns never triples its volume.

• Daily and hourly caps you set per mailbox
• A gap between sends, so emails don't leave in bursts
• The limit in force shown on every mailbox

New mailboxes start quietly

A freshly connected mailbox sends a small number of emails at first and grows day by day, until it reaches the daily limit you set.

A health score for every mailbox

Each mailbox gets a score out of 100 from its domain's records and how its last 14 days of sending went: bounces and replies. Every point it loses is explained, so you know what to fix. When more than 4% of a mailbox's emails bounce, it pauses itself and its campaigns carry on from your other mailboxes.

Emails that look written, not blasted

Every email carries a plain-text version next to the HTML, and nothing in its headers names the tool that sent it. New campaigns start with open and click tracking off, because tracking pixels and redirected links are what spam filters look for. Switch a campaign to plain text only in one click.

Your domain, checked

Outsquid looks up SPF, DKIM, DMARC and MX for every sending domain and rates each one pass, partial or fail; the free DNS checker shows the record and what to change. The check repeats every hour, or on demand after you change a record, so a broken one doesn't go unnoticed.

Gmail, Outlook or anything with SMTP

Sign in with Google or Microsoft, or add any mailbox with SMTP and IMAP. Replies to SMTP mailboxes are read over IMAP, so they reach your inbox like the others.