Is su.se a valid email domain?
su.se has working mail routing: 4 MX records pointing, led by mailfilter-ng-1.sunet.se.
It is not a free provider and is not on our disposable list, so addresses here usually belong to a company, school or other organisation.
SPF is published and ends with ~all. DMARC is set to reject.
Check an email address at su.se
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MX records
| Priority | Mail server | Resolves to |
|---|---|---|
| 10 | mailfilter-ng-1.sunet.se | 192.36.171.207, 2001:6b0:8:2::207 |
| 10 | mailfilter-ng-4.sunet.se | 89.45.235.5 |
| 10 | mailfilter-ng-3.sunet.se | 192.36.171.200, 2001:6b0:8:2::200 |
| 20 | mailfilter-ng-2.sunet.se | 89.45.235.13 |
SPF
Record published
v=spf1 ip4:77.238.35.11 ip6:2001:6b0:5:1212:250:56ff:feaf:6c7f ip4:77.238.36.76 ip6:2001:6b0:5:1213:250:56ff:feaf:c14c ip4:77.238.37.81 ip6:2001:6b0:5:1214:250:56ff:feaf:8222 include:_spf-a.su.se ~all
DMARC
Policy: reject
v=DMARC1; p=reject; rua=mailto:d07470bcebd7137@rep.dmarcanalyzer.com; ruf=mailto:d07470bcebd7137@for.dmarcanalyzer.com; pct=100; fo=1
Disposable?
No, not on our disposable list.
Free provider?
No, not a known free provider.
What this means for your email list
What this means for addresses at this domain
su.se looks like an organisation's own domain. Those are usually good leads, and also where bounces come from: people change jobs and mailboxes get closed. Checking each address, including whether the server accepts any recipient, avoids damaging your sender reputation.
Sender authentication
su.se has a strict DMARC policy (reject): mail that fails authentication is refused, which protects its brand from spoofing and means anyone sending as su.se must have SPF and DKIM set up correctly.
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Sign up to get a report summary →Frequently asked questions
- Is su.se a valid email domain?
- Yes. su.se publishes 4 MX records and can receive email. Whether a particular mailbox exists is a separate question that only a mailbox check can answer.
- Is su.se a disposable email domain?
- No. su.se is not on our disposable list. The list is updated regularly, and new throwaway domains appear all the time.
- What are the MX records for su.se?
- mailfilter-ng-1.sunet.se (priority 10); mailfilter-ng-4.sunet.se (priority 10); mailfilter-ng-3.sunet.se (priority 10); mailfilter-ng-2.sunet.se (priority 20).
- Does su.se have SPF and DMARC?
- SPF: yes, ending ~all. DMARC: yes, policy reject.