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Return-Path

The return-path domain is used for:
  • Receiving bounce messages and spam complaints
  • SPF authentication
  • It is your envelope sender (like, literally the address on an envelope)
The Return-Path is also called the Envelope Sender, MAIL FROM or Bounce Address.

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What Is SPF?

SPF (Sender Policy Framework) authorizes which servers can send emails from your domain. Lettermint simplifies SPF setup by handling it automatically through CNAME records. Removing the need to set it up yourself.

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Configuring SPF

Lettermint uses your Return-Path domain for SPF authentication:
  1. Set up a CNAME record for your Return-Path domain
  2. Lettermint manages the SPF record at the CNAME target
  3. Email providers validate SPF against the CNAME target

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CNAME Setup

Add the CNAME record provided in your dashboard:
SPF record from Lettermint.co
This CNAME points to Lettermint’s infrastructure, where we maintain the SPF record: lm-bounces.lmta.net TXT v=spf1 include:spf.lmta.net -all