This article applies to:
- MailMarshal Cloud/SEG Cloud
- Delivery to Gmail addresses
Question:
- Why is mail to Gmail "temporarily undeliverable" or rejected?
- Error message shown in MailMarshal Cloud delivery log:
421-4.7.0 This message does not have authentication information or fails to pass authentication checks
550-5.7.26 This message does not have authentication information or fails to pass authentication checks.
Information:
Gmail policies check for SPF, DKIM, or DMARC domain authentication. Mail sent to Gmail can be delayed or blocked if your domain does not have at least one of these methods set up.
- More information from Google is in the Gmail Bulk Senders guidelines.
- For help setting up SPF with SEG Cloud, see Trustwave MailMarshal Cloud KB article Q21001
Trustwave MailMarshal Cloud KB article Q21058
Last Modified: March 7, 2022