Forward email to Slack / Porkbun Email Forwarding
Forward a Porkbun email forward (support@) to Slack
Porkbun's email forwarding has no mailbox to sign in to. Create a forward from support@ to your RelayMail address, and each email starts a Slack thread. Replies from the thread go back to the customer as email.
Steps
- 1
Open email forwarding for the domain
In Porkbun's Domain Management, find the domain and click the envelope icon under EMAIL. On the Email Hosting and Forwarding page, use the Porkbun Email Forwarding section.
- 2
Create the forward
Under Create a New Forwarding Address, enter support and the forwarding address from your RelayMail setup page (inbox-...@relay.relaymail.app), then click Create Email Forward.
- 3
Check DNS if your nameservers are elsewhere
With Porkbun nameservers, the first forward sets the MX and SPF records. Otherwise, at your DNS host replace the root MX records with fwd1.porkbun.com (priority 10) and fwd2.porkbun.com (priority 20), and add include:_spf.porkbun.com to your one SPF record.
- 4
Send a test email
Email support@ from a different address. When it arrives, RelayMail confirms forwarding by itself and the email appears in the channel as a thread; reply there and the sender gets your reply by email.
Confirming the forward
Porkbun describes no confirmation email for a new forward: enter the address and destination and click Create Email Forward. If one does arrive, RelayMail passes it on to the email on your Slack account until forwarding is confirmed. Replies you write in the Slack thread go out from noreply@relay.relaymail.app with Reply-To set to your support address, so the customer's answer comes back through the same forward into the same thread. To send replies as support@ itself, verify your domain in RelayMail (see the custom domain guide); that adds sending records for RelayMail and does not change where your inbound mail goes.
What to watch for
- Forwarding takes over the domain's mail: a domain has one set of MX records, and adding forwarding removes root MX records that aren't Porkbun's, so another provider stops receiving mail for that domain.
- Up to 20 forwards per domain, and no catch-all or wildcard addresses.
- Only one SPF record on the root domain. Porkbun leaves the record alone if its include would push it past 10 lookups or 255 characters, and forwarded mail may then fail SPF checks.
- Deleting the last forward (with no Porkbun mailboxes) removes Porkbun's MX and SPF records, and mail to the domain stops being accepted until new MX records are set.
Questions
Can Porkbun forward support@ while Google Workspace keeps the rest?
No. Porkbun says a domain can have only one set of MX records, so forwarding and another mail provider can't share the same domain.
How many email forwards does Porkbun allow?
Up to 20 per domain; one forward can go to several recipients.
Answer Porkbun Email Forwarding email from the Slack thread
14-day trial, $0 today, then from $15/month per inbox. Cancel in Billing before day 14 and you pay nothing.
See plans and start the trialUpdated 2026-11-07. How we check these pages. Sources: Porkbun: How to set up email forwarding, Porkbun: Set up email forwarding (guide), Porkbun: Email when your DNS is hosted elsewhere.
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