Mailbox Settings and Options

Manage sending limits, ramp-up mode, human-like patterns and more.

Written By Kevin Lawrie

Last updated About 1 month ago

Identity

Setting	What it does
From name	The display name recipients see on outbound email
Signature	A plain-text signature, inserted into any email step with `{{mailbox_signature}}`
Tags	Freeform labels to help you find and filter mailboxes when assigning senders to a campaign

Sending volume

Setting	What it does
Daily send limit	The target maximum emails this mailbox sends per day. Typical default: 30.
Gradual Ramp-up	Starts a new mailbox below its daily limit and increases automatically each day until it reaches the target. This is a volume ramp, not a peer-to-peer warmup network.
Humanize daily limit	Randomizes each day's effective cap between a floor percentage and the daily limit, so volume doesn't look identical day to day.
Custom pacing	Minimum and maximum minutes between individual sends from this mailbox.

⚠️ Note: Gradual Ramp-up and Humanize work together but do different jobs. Ramp-up controls how fast a new mailbox climbs toward its target. Humanize controls day-to-day variance once it's there. Use both.

Inbox and reply behavior

Setting	What it does
Inbox sync	Campaign replies only (recommended) shows just campaign-linked mail in your Unified Inbox. All inbound mail brings in everything that hits this mailbox.
Default Linked Social Sender	Prefills the pairing when this mailbox is used in a Social + Email campaign.

Mailbox lifecycle

Setting	What it does
Pause / Resume	Stops or resumes sending without deleting credentials or losing ramp-up progress
Remove	Disconnects the mailbox and deletes its stored credentials permanently

Status reference

Status	Status Meaning
Active	Connected and sending normally
Paused	Connected, sending temporarily stopped
Needs Reconnect	Credentials need to be re-entered
Disconnected	Removed from the workspace
Error	Connection attempt failed

💡 Tip: When a mailbox is missing its Signature, Tags, or Default Linked Social Sender, that's expected right after a bulk import. These three settings aren't available during bulk import and need to be set individually afterward. See [Import email accounts in bulk from a CSV].