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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