Sending domain

By default, every affiliate-facing email Rekomi sends (invitations, payout notifications, approval emails) is sent from notifications@mail.rekomi.com. That works, but it has two costs: affiliates may flag it as unfamiliar and inbox placement is tied to Rekomi's shared sending reputation.

A custom sending domain solves both. Verify a sub-domain you own and Rekomi will send those emails from your domain with DKIM and SPF alignment (with DMARC recommended on top; see below). The brand keeps using Rekomi's underlying email infrastructure (Resend); only the visible sender changes.

Before you start

You need:

• A sub-domain you control (e.g. partners.yourbrand.com). We recommend a sub-domain rather than the apex (yourbrand.com) so this setup never collides with email your team already sends.
• DNS provider access (Cloudflare, Route 53, Namecheap, GoDaddy, etc.).
• About 15 minutes for DNS propagation.

You do not need:

• A Resend account. Rekomi pays for the underlying sending; this is included with your Pro plan at no extra cost.
• A dedicated sending IP. Sending uses Resend's shared pool today.

Connect your sender domain

1. Open Settings → Sending domain (/dashboard/settings/sending-domain) in the Rekomi dashboard.
2. Enter the sub-domain you want to send from (e.g. partners.yourbrand.com).
3. Enter the sender name your affiliates will see (e.g. Yourbrand Affiliate Campaign).
4. Optionally set a reply-to address. When omitted, replies go to your account's billing email.
5. Click Register sender domain.

Rekomi creates a domain entry in Resend and returns a small set of DNS records you need to add.

Add the DNS records

The records Rekomi provides cover:

• DKIM (CNAME or TXT). Cryptographically signs your outbound mail.
• SPF (TXT). Tells receivers that Rekomi's sending infrastructure is authorized.

DMARC is recommended but not included in the returned records: it defines policy when DKIM or SPF fails, and you add it yourself as a _dmarc TXT record on your sub-domain (a relaxed starting policy like v=DMARC1; p=none; is fine) once DKIM and SPF verify.

Copy each record's name and value into your DNS provider. Set TTL to "Auto" or 300 seconds.

Most DNS providers strip the trailing dot on the record name. Both forms work.

Verification

After you add the records, click Check now in the Rekomi dashboard. Rekomi asks Resend to re-check DNS and shows the result.

DNS propagation usually takes 5 to 15 minutes. Rekomi automatically polls every 30 seconds while the verification is pending, so you can leave the page open.

Once Resend confirms every record, the status flips to Verified and the dashboard shows a preview of how the From header will look to affiliates.

What gets sent from your domain

After verification, the affiliate-facing emails go from your domain:

• Affiliate invitations
• Payout sent notifications
• Application approved (welcome) emails

What still sends from Rekomi

A small set of emails continues to send from Rekomi's own sender:

• Payout failed notifications (these go to your billing contact, not the affiliate, so you can act on them)
• Sign-in flows (handled by our auth provider, not Rekomi)
• Trial expiry warnings (sent to you, not affiliates)
• Billing notifications from Stripe (handled by Stripe directly)
• Legal / compliance notifications (when we need to reach you as an account holder, not as a brand)

This split is intentional: your sender domain is for emails to affiliates. Account-level emails to you stay on the Rekomi infrastructure so you can always reach support and we can always reach you.

Troubleshooting

Status stays Pending for more than 30 minutes

DNS propagation can take longer for some providers. Check the records directly with dig or nslookup, using the exact record name shown in the dashboard:

dig TXT <record-name-from-dashboard>

If the records do not return, double-check they were saved in your DNS provider. Some providers require you to wait a few minutes between save and propagation.

Status flips to Failed

Resend's DNS check found a problem. Look at the Status column in the records table. Records showing Failed are the ones that need attention. Common causes:

• Record value was pasted with extra whitespace or quotes
• DNS provider auto-appended your domain to the record name, producing a doubled name like record.partners.yourbrand.com.partners.yourbrand.com
• TTL set too high; lower to 300 seconds

After fixing, click Check now.

One record verified, another did not

Each record verifies independently. The domain as a whole only verifies when every record is confirmed. Check each row's status.

Disconnecting

To stop sending from your domain:

1. Open Settings → Sending domain.
2. Click Disconnect.
3. Type DISCONNECT EMAIL SENDER to confirm.

The Resend domain entry is torn down and affiliate emails revert to sending from notifications@mail.rekomi.com on the next send. You can reconnect later.

FAQ

Does this cost extra?

No additional fee. The sending domain feature is included in the Pro tier alongside full white-label removal (remove Rekomi branding). For reference: the custom tracking domain (first-party tracking plus the affiliate-portal subdomain) and customer-facing webhooks are available on every plan. Starter and Growth tiers see a Pro upgrade prompt on the settings page for the sending-domain feature specifically; accounts still in the 14-day trial can use it during the trial.

Can I use the apex of my domain (yourbrand.com)?

We strongly recommend a sub-domain (e.g. partners.yourbrand.com or affiliates.yourbrand.com) so DKIM, SPF, and DMARC for your existing email never collide with the Rekomi-sent affiliate mail. The apex is accepted, but risky for exactly that reason.

What is the From address exactly?

<Your sender name> <noreply@<your-sub-domain>>. The local part is locked to noreply in v1; we may allow customization in a future release.

Can affiliates reply?

Yes. Replies go to whatever Reply-to you set during setup. If you left it blank, replies go to the billing email on your Rekomi account.

Will my domain reputation be affected?

Your domain inherits the deliverability characteristics of Resend's shared sending IPs. For 95% of brands this is a net improvement over the default. Dedicated IP isolation is on the roadmap.

Can I send marketing campaigns from this domain through Rekomi?

To your affiliates, yes. Rekomi sends both the automated affiliate lifecycle emails (invitations, approvals, payout notices, and the rest of the catalog on the Emails page) and your broadcasts to affiliates, and all of them go out from your custom sending domain once it is verified. What Rekomi does not do is email your customers; for marketing to your customer list, use a dedicated tool (Customer.io, Loops, etc.).