Cold email lives or dies on deliverability. A brand-new mailbox that suddenly sends 50 emails a day lands in spam, and can burn the domain it sends from. Dalil's Outbound Channels give you the infrastructure to do this properly: dedicated sending domains, managed mailboxes, and a warm-up network that builds sender reputation before you go live.

You'll find it under Settings → Outbound Channels, with three areas: domains, mailboxes, and warm-up.

Why separate sending infrastructure

Never run cold outbound from your main company domain. If reputation takes a hit, it affects every email your company sends, including invoices and support. The standard play, which Dalil manages end to end:

Buy lookalike domains (yourcompany-hq.com, tryyourcompany.com)
Create a few mailboxes per domain
Warm them up for weeks
Send within daily limits, spread across mailboxes

Domains

From Outbound Channels you can:

Check availability and purchase sending domains (priced per year, with auto-renew)
Auto generate domains: tell Dalil your primary domain and how many you need, and it proposes variants
Manage DNS: sending records are handled for you, with Bulk DNS update across domains
Set a DMARC email to receive DMARC reports (use sparingly: the volume is high)
Configure domain forwarding so anyone visiting your sending domains is redirected to your real website: a legitimacy signal for both prospects and filters
Optionally add a Dedicated IP, reserved exclusively for your sending infrastructure, for maximum deliverability control

Mailboxes

Mailboxes are provisioned on your domains against your plan's mailbox slots (buy more slots as you scale):

Auto generate mailboxes across your active domains, or add them manually
A maximum number of mailboxes per domain is enforced: concentration on one domain is a spam signal
Configure each mailbox's signature and forwarding, so replies to sending mailboxes land in an inbox your team actually reads (Forward to URL is recommended)

Warm-up

Warm-up gradually exchanges real emails between your mailboxes and a trusted network to build sender reputation.

Starting it: open the Warm-up tab → Add mailboxes to warm-up → select eligible mailboxes.

Monitoring it: the warm-up table tracks each mailbox's progress:

Days done / days left in the ramp
Warm-up emails sent
Health: how the mailbox's reputation is developing
Landed in spam: how many warm-up emails hit spam folders (falling over time is the goal)

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Keep mailboxes warming for at least a few weeks before heavy outbound use. Adding a cold mailbox straight into a high-volume sequence is the most common self-inflicted deliverability wound.

Mailboxes can be removed from warm-up once they're carrying real sending load; many teams keep a low warm-up baseline running alongside outbound.

Connecting to your sequences

Once warmed, mailboxes become senders for your sequences. Deliverability discipline from there:

Respect the per-sender daily limits (default 50/day per mailbox: raise gradually)
Spread volume across multiple warmed mailboxes rather than maxing one
Watch Message not sent / Delivered rates in sequence analytics: a delivery dip is your early warning
Keep reply handling honest: pause on reply, honor unsubscribes: engagement signals feed reputation

Key outcome

Outbound Channels productises the deliverability playbook that agencies charge retainers for: isolated domains, managed DNS, provisioned mailboxes, and network warm-up, so by the time your sequences go live, your infrastructure already looks like a trustworthy sender.

Mailbox warm-up and deliverability