Soft Bounce
A soft bounce is an email that failed for a temporary reason, like a full mailbox.
Soft bounces are usually short-lived. The mailbox might be full, the server might be busy, or the message might be too large. The email may go through if you try again later.
If an address keeps soft bouncing over time, treat it like a hard bounce and take it off your list.
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Start freeLast updated: June 25, 2026