What is Sending domain?
A sending domain is the domain name used in the technical authentication of your emails, often a subdomain of your main site.
Using a subdomain for marketing email, such as a mail or news prefix, keeps its reputation separate from your main domain and the mailboxes your team uses.
It must be authenticated with SPF, DKIM and DMARC and used consistently.
A worked example.
A bicycle store sends marketing from a subdomain such as mail.example.com, authenticated with SPF, DKIM and DMARC. If a campaign hurts that subdomain's reputation, staff mailboxes on the main domain are unaffected.
Common mistakes.
- Sending marketing from a free mailbox address
- Switching sending domains often
- Not authenticating the subdomain
Want this handled for your store? See our email deliverability service or book a free audit.
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