A custom domain is your own branded domain (like company.com). Learn why custom domains improve credibility, deliverability control, and brand trust.
A custom domain is a branded domain name you own, such as company.com, used for your website and email addresses. Using a custom domain for email (like name@company.com) typically looks more professional and helps establish brand credibility.
From a deliverability perspective, a custom domain gives you control over authentication and reputation. You can configure SPF, DKIM, and DMARC, monitor reporting, and build a stable sender identity over time.
Custom domains also make scaling easier because you can create role addresses (support@, billing@) and aliases without relying on free mailbox providers. The key is maintaining good sending practices so the domain’s reputation stays healthy.