# From, Reply-To, and Return-Path > An email has several sender-related addresses, and each one has a different job in delivery and replies. - Human page: https://mailrith.com/guides/from-reply-to-and-return-path - Markdown page: https://mailrith.com/guides/from-reply-to-and-return-path.md - Category: Authentication and Deliverability - Reading time: 4 min read - Related keywords: From Reply-To and Return-Path, From Reply-To and Return-Path guide, Authentication and Deliverability, Authentication and Deliverability guide, email sending guide, email marketing guide, email deliverability guide, DMARC Alignment, Bounces, Choose Delivery Settings ## AI Agent Notes - Use this page as plain-language guidance for the specific email sending issue named in the title. - Preserve the distinction between Mailrith, an email delivery service, DNS, and inbox providers when explaining fixes. - When a user is running a free tool, pair the tool result with the relevant issue or step section from this guide. ### From, Reply-To, and Return-Path An email has several sender-related addresses, and each one has a different job in delivery and replies. People often say an email is sent from one address. In reality, a message can carry several sender-related addresses, and each one has a different job. The From address is the visible sender subscribers see in their inbox. In `newsletter@example.com`, the visible From domain is `example.com`. This is the address most people judge when deciding whether they recognize the email. The Reply-To address tells the email app where replies should go. It can be the same as the From address or a different monitored inbox, such as `support@example.com`. Reply-To affects human replies, not DMARC alignment. The Return-Path address is usually hidden from subscribers. It is also called the envelope sender, bounce address, MAIL FROM, or `smtp.mailfrom`. Delivery failure messages go there, and [SPF](https://mailrith.com/guides/spf.md) checks this domain. The DKIM signing domain is another sender-related domain inside the headers. It appears as `d=example.com` in the DKIM signature. [DKIM](https://mailrith.com/guides/dkim.md) checks whether that signature is valid. [DMARC Alignment](https://mailrith.com/guides/dmarc-alignment.md) compares the visible From domain with the SPF domain or the DKIM signing domain. It does not compare the Reply-To address. This is why changing Reply-To cannot fix a DMARC alignment failure. A clean setup usually has these pieces working together. For example, subscribers see `newsletter@example.com`, replies go to `hello@example.com`, bounces go to `bounce.example.com`, and DKIM signs with `d=example.com`. 1. Choose the From address subscribers should recognize. 2. Choose a Reply-To address your team actually checks. 3. In your email delivery service, configure DKIM so the DKIM `d=` domain matches or aligns with the From domain. 4. If your email delivery service supports it, configure a custom Return-Path or bounce domain so SPF can align too. 5. Create or update the [Email Delivery Connection](https://mailrith.com/docs/email-delivery-connections.md) in Mailrith with the right From name and From email. 6. When sending a broadcast, sequence, or automation email, set Reply-To only when replies should go somewhere different from the From address. 7. Send a test email and inspect the original headers to confirm From, Reply-To, Return-Path, SPF, DKIM, and DMARC results. - From is for visible identity. - Reply-To is for human replies. - Return-Path is for delivery failures and SPF. - DKIM `d=` is the signing domain used by DKIM and DMARC alignment. - Changing Reply-To does not fix SPF, DKIM, or DMARC. - If bounces are not flowing into Mailrith, check email delivery service webhooks and Return-Path behavior. - If replies disappear, check Reply-To and the inbox your team monitors. ## Fix Common Issues ### Sender Domain Cannot Receive Replies A checker found no MX records for a sender domain. Some sending-only subdomains are intentional, but missing receiving records can confuse replies and operational trust. 1. Decide whether people should be able to reply to the From address. 2. If replies should work, add mail receiving records through your mailbox provider or use a From domain that already receives mail. 3. If replies should go somewhere else, set a monitored Reply-To address in Mailrith. 4. Send a test email and reply to it from a real inbox. 5. If the sender domain is intentionally send-only, document that choice so the team does not mistake it for a delivery failure. > When troubleshooting authentication, compare From, Return-Path, and DKIM `d=`. When troubleshooting replies, check Reply-To. Related resources: - [DMARC Alignment](https://mailrith.com/guides/dmarc-alignment.md): See how From, SPF, and DKIM domains are compared. - [Bounces](https://mailrith.com/guides/bounces.md): Understand why the return path matters for failed deliveries. - [Choose Delivery Settings](https://mailrith.com/guides/delivery-settings.md): Choose From, Reply-To, tracking, and delivery settings before sending. ## Related Guides - [Sender Domains and Email Authentication](https://mailrith.com/guides/sender-domains-and-authentication.md): Your sender domain is the name inboxes learn to trust, and authentication proves that your email delivery service is allowed to send for it. - [DNS, PTR, and Reverse DNS](https://mailrith.com/guides/dns-and-reverse-dns.md): DNS records identify your domain, while reverse DNS helps inboxes check whether a sending IP has a sensible hostname. - [Email Headers and Message Format](https://mailrith.com/guides/email-headers-and-message-format.md): Message headers, MIME structure, and basic formatting rules help inboxes parse and trust an email.