How do I send from a custom sending domain?

Learn how to setup and verify your domain name to send your newsletter from a custom email address.

By default, all Letterhead accounts are setup with a custom sending email, so that our customers can send emails upon logging in to their account.  However, it's important to note that, to improve email deliverability, the reply-to email address and the sending address should share the same root domain.  So, although our email addresses are from warm IPs, if your reply-to address is not '@gmail, or @hotmail, etc.' and you have access to your DNS settings, it is best to go through the process below to request a custom sending domain.

We recommend using a subdomain (i.e. mail, in to further protect your root domain (i.e., in case any of your recipients reports your email as spam.  Also, if you decide to set it up with your root domain, please note that we will need to setup a separate subdomain to properly track bounces and not impact inbound emails sent to your domain.

Setting up your custom sending domain (video and written instructions below):

  1. To send newsletters from your custom domain name, submit a support ticket and include your desired domain name and email address (e.g.,
  2. We'll then provide you with two DNS records to update your domain registrar (Google Domains, Godaddy, Namecheap, etc.).
  3. Once you've made those updates, reply to your support ticket, confirming that you have updated your DNS records.
  4. We will then verify and update your account, upon successful verification.

Our team will check the sending health of your desired custom domain, as part of this process, and clear it with major ISPs.

Depending on the results, our system may recommend that you use one or more subdomains (for example,, instead of the top-level domain for sending, to improve performance and reduce bounces. 

If needed, we will also recommend custom IP addresses. Note that while some consultants recommend custom IPs for every sender, this is typically not needed in practice and usually provides no measurable benefit; your domain and its reputation (along with the content of your emails) are significantly more important.