Notifications of undeliverable emails are only sent to senders that can be verified via SPF or other trusted means.
Topic
Notifications of undeliverable emails
Applicable to
all
History
Priority
recommended
Mar 2022
Notifications of undeliverable emails are only sent to senders that can be verified via SPF or other trusted means.
Miscellaneous changes were made to rationale and recommendations throughout the publication to clarify content without changing intent. This included a review from the Guidelines for System Hardening chapter through to the Guidelines for Data Transfers chapter.
2015
Agencies should only send notification of undeliverable, bounced or blocked emails to sendersthat can be verified via SPF or other trusted means.
2010
It is recommended agencies send notification of undeliverable, bounced or blocked emails to senders thatcan be verified via SPF or other trusted means.