Product review

Mailscale

Cold email inboxes set up in minutes

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What is

Mailscale

Mailscale creates and manages the email accounts and domains that cold outreach teams send from. It handles domain setup and mailbox configuration so teams can spin up many sending inboxes quickly and plug them into sequencers like Smartlead, Instantly or GoHighLevel. The company now also describes itself as an agentic platform that automates high-volume B2B cold email while the user keeps control of strategy.

02 — Who it’s for

Ideal Customer Profile

Aimed at outbound agencies, startups and sales teams that run cold email at volume and need many sending accounts across domains or clients.

03 — Capabilities

Key Features

Bulk email account creation

Domain purchase and setup

Multi-client domain management

Sequencer connections

Deliverability guidance

Shared sending infrastructure

05 — Similar tools

Alternatives

LUNATRO.MX

Outlook-based mailboxes for cold email

Hypertide

Automated cold email inbox infrastructure

Mailforge

Cold email domains and mailboxes, set up fast

Infraforge

Private cold email infrastructure on dedicated IPs

InboxKit

Mailbox setup and warmup for cold outreach

Mission Inbox

Dedicated email sending infrastructure

06 — FAQ

Frequently Asked Questions

What is Mailscale used for?

Mailscale is used to create and run the mailboxes and domains behind cold email campaigns, so outreach teams can send at scale without building email infrastructure themselves.

Does Mailscale send the campaigns?

Its help center focuses on connecting Mailscale accounts to sending tools such as Smartlead, Instantly and GoHighLevel, which run the sequences. The newer site also describes an agentic layer that automates cold email prospecting.

Can I manage several clients or brands?

Yes. The help center explains how to set up separate email accounts across multiple domains, which suits agencies handling outreach for different clients.

Can I move existing Gmail or Outlook accounts into Mailscale?

No. According to the help center, transferring existing Gmail or Outlook accounts into Mailscale is not currently possible, so new accounts are created on Mailscale.

Ready to try

Mailscale

Cold email inboxes set up in minutes

Visit Website