By default, Tacto sends emails from a Tacto address. You can set up your own sender domain so that outgoing emails come from your own brand (e.g. [email protected]). This improves recognition and usually increases deliverability.
Before you start
A domain whose DNS records you can edit (or someone who can do this for you).
Permission to edit the workspace settings (admins and Key Users).
About 10 minutes of work + up to 24–48 hours of waiting for DNS propagation.
Choose a sender subdomain
Required: a dedicated subdomain (procurement.yourorganization.com) instead of your main domain – it doesn't conflict with your existing email configuration, has an independent reputation and can be removed at any time.
Step-by-step setup
Open Settings → Workspace → General Settings → Email domain.
Click Set up custom domain.
Enter: Domain (your subdomain), Display name (shown in the sender field), Email address (the part before the
@).Add domain – Tacto shows the required DNS records.
Add each record at your DNS provider (use the copy buttons).
Wait for DNS propagation (minutes up to 24–48 hours).
Verify DNS records – if successful, the status changes to Active.
Send test email to a mailbox you can access.
Turn on the Send emails from your custom domain toggle (can be turned off again at any time – falls back to the default address).
DNS records & common mistakes
Tacto shows the Host and Value for each record. Common pitfalls: duplicated domain (your provider appends the domain automatically → shorten to s1._domainkey.procurement if needed), trailing dot, double quotes around TXT values, truncated (long) DKIM values.
If verification fails
Most common causes: DNS not yet propagated (wait 10–15 minutes), wrong host name, truncated value, wrong record type (TXT/CNAME/MX), SPF conflict on the parent domain.
If the test email doesn't arrive
Check spam/junk, rule out internal mail filters (send a test to a private address), verify DNS again (the status only updates when you click).
Deactivate or delete
The toggle can be turned off at any time; Tacto then falls back to the default address. The same applies when you delete the domain completely. A safe emergency switch in case of delivery problems.
FAQ
Main domain instead of subdomain? No, a dedicated subdomain is required for Tacto to send emails from. Can the custom domain receive replies? No, it's for sending only; replies go to the reply-to address. Why MX records? Some receiving servers reject emails without an MX record. Key storage? DKIM keys are managed securely by the email provider; rotate them by removing and re-registering the domain. Need help? Send the domain name + error message to Tacto Support.