Email domain reports
Company email domains on Cisco Secure Email: formats and catch-all status
4 of the 111 company domains mailfloss reports on route incoming mail through Cisco Secure Email, a security gateway that filters mail before it reaches the mailbox provider, going by each domain's MX record as last observed. 1 of them mostly accept mail for addresses that do not exist. Formats and verification results are from the 90 days to November 6, 2026, or a domain's last report with enough data, dated on its page; catch-all status carries its own date.
Domains on Cisco Secure Email
| Domain | Most common format | Accepted on verification | Catch-all |
|---|---|---|---|
| f5.comF5 | [email protected]83–100% of addresses | 74–82% | catch-all: Yes |
| intuit.comIntuit | [email protected]79–98% of addresses | 68–76% | catch-all: No |
| ngc.comNorthrop Grumman | [email protected]88–100% of addresses | 89–96% | catch-all: No |
| rbc.comRBC | [email protected]92–100% of addresses | 77–83% | catch-all: No |
Browse all company email domains or read how mailfloss measures email formats and catch-all status.