DocsCustom Email Domain
Send replies from your own agency email domain (self-serve add-on)
Custom Email Domain
By default, Sift assigns each organisation an inbound email address in the format
{agency-name-slug}-{org-id-prefix}@inbound.sift.software. For example, an agency called
"Smith Jones Lettings" would receive the address smith-jones-lettings-abc123@inbound.sift.software.
With a custom email domain, replies and outbound emails appear to come from your agency's own
domain — for example, enquiries@smithjones.co.uk — preserving brand consistency and improving
deliverability.
Pricing & Availability
Custom email domain is a self-serve add-on:
- Starter: £9/month add-on
- Growth: £9/month add-on
- Scale: included at no extra cost
You can enable it directly in Settings → Channels — no support ticket required.
What It Looks Like
| Setting | From address |
|---|---|
| Default (all plans) | smith-jones-lettings-abc123@inbound.sift.software |
| Custom domain | enquiries@youragency.co.uk |
How It Works
Sift uses Postmark as the underlying email provider. When you add a custom domain, Sift provisions it in Postmark and generates two DNS records unique to your domain — a DKIM record (for signing outbound mail) and a Return-Path record (for bounce handling and deliverability). Once both records are verified, Sift starts sending from your domain automatically.
While DNS is propagating, replies continue to send from Sift's platform sender so no message fails to deliver during the wait.
Step-by-Step Setup
In the dashboard sidebar, click Settings, then select the Channels tab.
Under Custom Email Domain, enter your agency domain (e.g. smithjones.co.uk). Do not
include https:// or a path — domain only.
Sift provisions the domain in Postmark and displays two DNS records for you to add. The exact host and value for each record are unique to your domain — copy them from the dashboard.
Add a TXT record using the host and value shown in Settings → Channels.
This record signs outbound mail from your domain so receiving servers (Gmail, Outlook, etc.) can verify it came from you.
Add a CNAME record using the host and value shown in Settings → Channels.
This record routes bounce notifications back to Sift so we can keep your sender reputation healthy.
Back in Settings → Channels, click Check verification. Sift queries Postmark to confirm both DKIM and Return-Path are verified. When both pass, your domain is activated and replies start sending from your agency address.
If verification fails, DNS may not have propagated yet. Wait a few minutes and try again, or leave it — Sift also runs a daily background check that re-verifies pending domains automatically, so the domain will activate on its own once the records go live (typically within minutes, but DNS propagation can take up to 48 hours in rare cases).