Overview
Our "Senders" feature allows you to send emails, like intake invitations, signature requests and carrier submissions, from your own domain. When you create a sender, Sembley automatically creates a sending domain based on the email address. You’ll need to verify the domain by adding DNS records before you can send emails.
⚠️ Configuring a custom domain is a technical process. This article is designed for people with some experience configuring custom domains. We recommend that you share it with your webmaster or a technical member of your team.
Complete Flow
Create Sender → Enter email address and full name in “New Sender” modal
Domain Appears → The domain is automatically created and appears in the list with “Unverified” status
View DNS Records → Click “Verify Domain” button to open a modal showing required DNS records
Add DNS Records → Copy and add each record to your DNS provider (see instructions below)
Verify Domain → Click “Verify Domain” button in the modal → Status changes to
verifying→active(orfailed)
DNS Records
The verification modal displays DNS records that must be added to your DNS provider:
TXT records for DKIM (e.g.,
pic._domainkey.yourdomain.com) and SPF (e.g.,v=spf1 include:mailgun.org ~all)CNAME records (e.g.,
email.yourdomain.com→mailgun.org)
Important: When entering the Host value, use only the subdomain part (relative host), not the full domain. For example:
If the modal shows
pic._domainkey.example.com→ enter onlypic._domainkeyIf the modal shows
example.com→ enter@or leave blank (root domain)If the modal shows
email.example.com→ enter onlyemail
Use the “Copy” button next to each record to copy the value, then add it to your DNS provider:
Provider-specific Instruction
Below are instructions for how to verify your domain depending on which of the most common hosting providers you use. If you use a hosting provider that isn't in this list, the process shouldn't change significantly.
Namecheap
Log in to Namecheap
Go to Domain List → Select your domain → Advanced DNS
Click Add New Record
Select record type (TXT Record or CNAME Record)
Enter the Host value:
For root domain (e.g.,
example.com): enter@For subdomain (e.g.,
pic._domainkey.example.com): enter onlypic._domainkey(do not include the domain)
Paste the Value from the app
Click the checkmark to save
Repeat for each DNS record shown in the modal
Cloudflare
Log in to Cloudflare Dashboard
Select your domain
Go to DNS → Records
Click Add record
Select the record type (TXT or CNAME)
Enter the Host value:
For root domain (e.g.,
example.com): enter@For subdomain (e.g.,
pic._domainkey.example.com): enter onlypic._domainkey
Paste the Value from the app
Click Save
Repeat for each DNS record shown in the modal
GoDaddy
Log in to GoDaddy Domain Manager
Select your domain → DNS tab
Scroll to Records section
Click Add → Select record type (TXT or CNAME)
Enter the Host value:
For root domain (e.g.,
example.com): leave blankFor subdomain (e.g.,
pic._domainkey.example.com): enter onlypic._domainkey
Paste the Value from the app
Click Save
Repeat for each DNS record shown in the modal
Route 53
Log in to AWS Console → Route 53
Select Hosted zones → Your domain
Click Create record
Select record type (TXT or CNAME)
Enter the Host value:
For root domain (e.g.,
example.com): leave blankFor subdomain (e.g.,
pic._domainkey.example.com): enter onlypic._domainkey
Paste the Value from the app
Click Create records
Repeat for each DNS record shown in the modal
Sender Verification
After creating a sender, a verification email is automatically sent. Click the verification link in the email to verify the sender. Senders show a “Pending” status until verified.
Notes
DNS propagation can take up to 48 hours (usually 5-30 minutes)
Wait a few minutes after adding DNS records before clicking “Verify Domain” in the modal
If verification fails, double-check that all record values match exactly (including spacing)
The domain must be verified before you can send emails from associated senders