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Forwarding starts once SPF includes Mailyoto

What the spf.mailyoto.com include does for forwarded email, and why the Forwarding pill waits for it.

Updated 29 October 2026

SPF is a TXT record that lists the servers allowed to send email for your domain. Mailyoto asks you to add include:spf.mailyoto.com to it, even if you only receive email. Your domain shows a tick on the Forwarding pill only when Mailyoto finds both its MX records and that include.

What the include does for forwarded email#

When Mailyoto forwards a message to amina.kone@gmail.com, it sends a new copy from its own servers. Every email carries an envelope sender, the address that receives bounces. It’s separate from the From line the reader sees.

Mailyoto can’t put the original sender’s address there. Its servers aren’t in that sender’s SPF record. The copy would fail SPF at the destination.

With the include in place, Mailyoto uses an address on your own domain as the envelope sender, in the form rp+<code>@lunavera.com. Your SPF record lists Mailyoto’s servers. The forwarded copy then passes SPF at the destination. If the destination returns the message, the bounce comes back to Mailyoto, which matches it to the original email.

Without the include, Mailyoto uses an address at bounces.yotosend.com instead. Forwarded email still arrives. Your domain stays unverified, and its Forwarding pill shows a cross.

What it does for email you send#

On Pro and Max, email you send through smtp.mailyoto.com also uses rp+<code>@ your domain as the envelope sender. The include lets that email pass SPF for your own domain, which counts toward DMARC alignment. Your DKIM signature covers the rest.

How the check reads your record#

  • The record must start with v=spf1 and contain an include: that ends in mailyoto.com.
  • The include can sit anywhere in the record, or inside another include, up to 5 levels deep.
  • A domain with 2 SPF records fails the check.
  • With white-label, the include names your white-label domain instead, such as include:spf.mail.tasteofmira.shop.

Mailyoto checks the record when you open the DNS tab, when you select Check DNS, and every day at 02:00 UTC.

Next steps#