251 User not local; will forward
When an SMTP mail server responds to a mail message with:
251 User not local; will forward
This indicates that the email address has changed to a new one, and that the SMTP server will forward the message to the correct address.
Node that if a 251 User not local response is received, you do not need to update your email address book; you can continue to use this address and do not need to inform the user of the forwarding.
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Also in this topic:
- 250 OK Response
- 552 Requested mail action aborted: exceeded storage allocation
- 550 Mailbox not found
- 454 4.7.0 Temporary authentication failure
- 530 5.7.0 Authentication required
- 535 Authentication credentials invalid
- 452 Too many recipients
- 452 Requested action not taken: insufficient system storage
- 451 Requested action aborted: local error in processing
- 450 Requested mail action not taken: mailbox unavailable
- 421 Service not available, closing transmission channel
- 554 5.3.4 Message too big for system
