Expired

Email Deliverability. When an SMTP server can't deliver an email message to a recipient within 72 hours, Twilio Email removes their email address from a contact list. Before this duration expires, Twilio Email defers email messages.

This error displays as Bounced - Expired.

Bounced email responses derive from Simple Mail Transfer Protocol (SMTP) 4XX or 5XX errors, which cause an email to be undeliverable:

• An expired, inactive, or disabled recipient address
• The recipient's mailbox has exceeded its limit
• An incorrect recipient email address
• Domain frequency limited
• Connection frequency limited
• IP frequency limited
• Too many invalid recipients