Yahoo 554.30: this mailbox is disabled
554 delivery error: dd (554.30)Mailbox is disabledPermanent: retrying will not helpFrom Yahoo Mail and AOL
554 delivery error: dd Sorry your message to user@example.com cannot be delivered. This mailbox is disabled (554.30). - mta1001.mail.gq1.yahoo.com
What it means
A disabled Yahoo mailbox still exists as an account, but Yahoo has stopped it from receiving mail. The most common reason is inactivity: Yahoo deactivates accounts that have not been signed in to for an extended period. The (554.30) suffix is Yahoo’s internal marker for this state.
For a sender, the practical effect matches a hard bounce. Unless the owner signs in and reactivates the account, every message will fail the same way. It differs from the “doesn’t have a yahoo.com account” error in that the account may come back, but list owners should still suppress it.
Likely causes
- The owner has not signed in for many months and Yahoo deactivated the mailbox.
- Yahoo disabled the account for a terms of service violation or suspected compromise.
- An old address that the owner abandoned when they switched providers.
How to fix it
- If you know the recipient, reach them another way and ask whether they still use the address.
- If you own the account, sign in at Yahoo Mail; inactive accounts can often be reactivated if they have not yet been deleted.
- For mailing lists, mark 554.30 responses as hard bounces and stop sending; repeated mail to disabled boxes is a negative signal at Yahoo.
- Use a re-engagement campaign before addresses go cold, so you notice abandoned mailboxes earlier.
Checks that apply
- MX Lookup Confirms the domain is served by Yahoo so the disabled status comes from the right system.
- Email Deliverability Reviews your sending setup to make sure list hygiene problems are not dragging your reputation down.
FAQ
- Will a disabled Yahoo mailbox ever accept mail again?
- Only if the owner reactivates it. Many are eventually deleted, after which you get the unknown user error instead.
- Does this mean my mail was blocked?
- No. The problem is the recipient’s account, not your server or content.