Email domain report
Northrop Grumman email format (ngc.com): verification & catch-all status
As of November 6, 2026, the most common ngc.com email format is [email protected], used by 88–100% of the at least 30 distinct ngc.com addresses mailfloss verified in the 90 days to November 6, 2026. ngc.com routes incoming mail through Cisco Secure Email. In mailfloss's checks (latest October 31, 2026), ngc.com mostly rejected addresses that do not exist, so it is not a catch-all domain. 89–96% of mailfloss's ngc.com verifications in the 90 days to November 6, 2026 were accepted.
One address at a time, right on this page · counts rounded
- Most common format
first.last@- 88–100% of distinct addresses
- Catch-all
- No
- mostly rejects unknown mailboxes · checked October 31, 2026
- Accepted on verification
- 89–96%
- of verifications, 90 days to November 6, 2026
Verification results
How ngc.com responds to email verification
How ngc.com answered when mailfloss verified its addresses in the 90 days to November 6, 2026, most recently on November 6, 2026.
Most common ngc.com email formats
| Format | What it means | Share | 95% range | Addresses |
|---|---|---|---|---|
[email protected] | First name, dot, last name | 88–100% | 72–100% | 30+ |
Shares are of the 30+ distinct ngc.com addresses mailfloss verified in the 90 days to November 6, 2026. A range shows where a share can sit given the addresses behind it. Uncommon formats are combined, and the words in each format are placeholders, never real names.
SMTP responses from ngc.com
| Response | What it means | Share of listed responses |
|---|---|---|
250 | Mailbox accepted the addressDeliverable | 93–99% |
550 5.1.0 | Mailbox does not existUndeliverable | 4% |
Only answers about the mailbox itself are listed.
Catch-all
No, mostly rejects unknown mailboxes
Last checked October 31, 2026
DNS, checked November 6, 2026
MX mx1.ngc.iphmx.com
SPF published · DMARC published
Free check
Verify an address at ngc.com
Type the part before the @. mailfloss asks the ngc.com mail server about that address and tells you in seconds what it answered: the same verification behind the results on this page.
Any other domain works too: type a full address. The result appears under the box; nothing you type is stored on this page.
Questions about ngc.com
Northrop Grumman email questions, answered from this data
Every answer comes from the numbers on this page, 90 days to November 6, 2026.
What email domain does Northrop Grumman use?
ngc.com. Its mail is routed through Cisco Secure Email (mx1.ngc.iphmx.com), with SPF published and DMARC published, checked November 6, 2026.
What is the most common ngc.com email format?
[email protected]: 88–100% (95% range 72–100%) of the 30+ distinct ngc.com addresses mailfloss verified in the 90 days to November 6, 2026.
Is ngc.com a catch-all domain?
No. In mailfloss's checks (latest October 31, 2026), ngc.com mostly rejected addresses that do not exist, so it is not a catch-all domain. Because ngc.com mostly rejects mailboxes that do not exist, a permanent (5xx) "mailbox does not exist" or "account disabled" answer from it is reliable, and those addresses can come off your list; a 4xx answer is temporary, so retry it. An accepted answer is strong but not certain evidence that the mailbox exists. A full inbox or a busy mailbox is temporary, so recheck those later.
Do ngc.com addresses bounce?
Of mailfloss's ngc.com verifications in the 90 days to November 6, 2026, 89–96% were accepted, 4% got no clear answer and 4% were rejected.
How do I find or check an email address at ngc.com?
Build it from the person's name in the most common format, [email protected], then verify it before you send: mailfloss asks the ngc.com mail server about that exact address and reports what it answered. Because ngc.com is not a catch-all domain, a clear answer means what it says. Verify one now.
Does Northrop Grumman use Google Workspace or Microsoft 365?
Its published MX record points to Cisco Secure Email, a security gateway that filters mail before it reaches the mailbox provider, going by its public mail records as of November 6, 2026; the provider behind it is not on record.
Other company domains on Cisco Secure Email
All 4 Cisco Secure Email domains| Domain | Most common format | Accepted on verification | Catch-all |
|---|---|---|---|
| rbc.comRBC | [email protected]92–100% of addresses | 77–83% | catch-all: No |
| 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 |
One check is a start. Keep every address on your list deliverable.
mailfloss runs this verification on your whole list, inside your email platform, and keeps running it as addresses change. Product teams and AI agents get the same checks from the API.
Every number here comes from verifications mailfloss ran for its customers in the 90 days to November 6, 2026. Pages show rounded aggregates only: no email addresses, names or single results. Read how mailfloss measures email formats and catch-all status.
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