Le champs SPF est un champs important pour la délivrabilité de vos e-mails. Mal configuré, absent, cela peut vous occasionner des rejets de réception des e-mails que vous envoyez à vos correspondants. Un autre champs TXT important est la signature DKIM qui jour également, énormément, en faveur de la délivrabilité des vos e-mails
Plus généralement, le SPF, ou Sender Policy Framework, est un système de vérification conçu pour empêcher l'usurpation d'adresse électronique en validant l'expéditeur d'un e-mail. Lorsqu'un domaine met en place un enregistrement SPF, il spécifie quels serveurs de messagerie sont autorisés à envoyer des e-mails. Lorsqu'un e-mail est reçu, le serveur de réception peut vérifier cet enregistrement pour s'assurer que l'e-mail provient d'un serveur des serveurs autorisés. Si ce n'est pas le cas, il peut être marqué comme suspect ou rejeté, ce qui aide à réduire le spam et le phishing en vérifiant que les e-mails proviennent bien de la source autorisés.
Domain Name: mtmsys.us
Registry Domain ID: D0556C86A49864881A7A52B0D162A3BC0-NSR
Registrar WHOIS Server: whois.opensrs.net
Registrar URL: www.opensrs.com
Updated Date: 2025-12-05T14:41:32Z
Creation Date: 2018-06-29T18:53:34Z
Registry Expiry Date: 2026-06-29T18:53:34Z
Registrar: Tucows Domains Inc.
Registrar IANA ID: 69
Registrar Abuse Contact Email: compliance@tucows.com
Registrar Abuse Contact Phone: +1.4165350123
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Domain Status: clientUpdateProhibited https://icann.org/epp#clientUpdateProhibited
Registry Registrant ID: C0E742CC96A454CF09741BA9B751D3A88-NSR
Registrant Name: Alan Pollock
Registrant Organization: Momentum Telecom
Registrant Street: 880 Montclair Road
Registrant Street: Suite 400
Registrant Street:
Registrant City: Birmingham
Registrant State/Province: AL
Registrant Postal Code: 35213
Registrant Country: US
Registrant Phone: +1.8772515554
Registrant Phone Ext:
Registrant Fax:
Registrant Fax Ext:
Registrant Email: sysops@momentumtelecom.com
Registrant Application Purpose: P1
Registrant Nexus Category: C21
Registry Admin ID: CCC190844382942378E109FDC94956949-NSR
Admin Name: Data Protected Data Protected
Admin Organization: Data Protected
Admin Street: 123 Data Protected
Admin Street:
Admin Street:
Admin City: Toronto
Admin State/Province: ON
Admin Postal Code: M6K 3M1
Admin Country: CA
Admin Phone: +1.0000000000
Admin Phone Ext:
Admin Fax: +1.0000000000
Admin Fax Ext:
Admin Email: noreply@data-protected.net
Registry Tech ID: CB7B8C1A92B1D48D6A8BF9CD7EBA614BF-NSR
Tech Name: Data Protected Data Protected
Tech Organization: Data Protected
Tech Street: 123 Data Protected
Tech Street:
Tech Street:
Tech City: Toronto
Tech State/Province: ON
Tech Postal Code: M6K 3M1
Tech Country: CA
Tech Phone: +1.0000000000
Tech Phone Ext:
Tech Fax: +1.0000000000
Tech Fax Ext:
Tech Email: noreply@data-protected.net
Name Server: ns02.momentumtelecom.com
Name Server: ns01.momentumtelecom.com
Name Server: ns04.momentumtelecom.com
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of WHOIS database: 2026-04-26T18:42:43Z <<<
For more information on Whois status codes, please visit https://icann.org/epp
.US WHOIS Complaint Tool - http://www.whoiscomplaints.us
Advanced WHOIS Instructions - http://whois.us/help.html
Registry Services, LLC, the Registry Administrator for .US, has collected this information for the WHOIS database through a .US-Accredited Registrar. This information is provided to you for informational purposes only and is designed to assist persons in determining contents of a domain name registration record in the registry database.
Registry Services, LLC makes this information available to you "as is" and does not guarantee its accuracy. By submitting a WHOIS query, you agree that you will use this data only for lawful purposes and that, under no circumstances will you use this data:
(1) to allow, enable, or otherwise support the transmission of mass unsolicited, commercial advertising or solicitations via direct mail, electronic mail, or by telephone;
(2) in contravention of any applicable data and privacy protection laws; or
(3) to enable high volume, automated, electronic processes that apply to the registry (or its systems).
Compilation, repackaging, dissemination, or other use of the WHOIS database in its entirety, or of a substantial portion thereof, is not allowed without our prior written permission.
We reserve the right to modify or change these conditions at any time without prior or subsequent notification of any kind. By executing this query, in any manner whatsoever, you agree to abide by these terms. NOTE: FAILURE TO LOCATE A RECORD IN THE WHOIS DATABASE IS NOT INDICATIVE OF THE AVAILABILITY OF A DOMAIN NAME. All domain names are subject to certain additional domain name registration rules. For details, please visit our site at www.whois.us.
Domain Name: mtmsys.us
Registry Domain ID: D0556C86A49864881A7A52B0D162A3BC0-NSR
Registrar WHOIS Server: whois.opensrs.net
Registrar URL: www.opensrs.com
Updated Date: 2025-12-05T14:41:32Z
Creation Date: 2018-06-29T18:53:34Z
Registry Expiry Date: 2026-06-29T18:53:34Z
Registrar: Tucows Domains Inc.
Registrar IANA ID: 69
Registrar Abuse Contact Email: compliance@tucows.com
Registrar Abuse Contact Phone: +1.4165350123
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Domain Status: clientUpdateProhibited https://icann.org/epp#clientUpdateProhibited
Registry Registrant ID: C0E742CC96A454CF09741BA9B751D3A88-NSR
Registrant Name: Alan Pollock
Registrant Organization: Momentum Telecom
Registrant Street: 880 Montclair Road
Registrant Street: Suite 400
Registrant Street:
Registrant City: Birmingham
Registrant State/Province: AL
Registrant Postal Code: 35213
Registrant Country: US
Registrant Phone: +1.8772515554
Registrant Phone Ext:
Registrant Fax:
Registrant Fax Ext:
Registrant Email: sysops@momentumtelecom.com
Registrant Application Purpose: P1
Registrant Nexus Category: C21
Registry Admin ID: CCC190844382942378E109FDC94956949-NSR
Admin Name: Data Protected Data Protected
Admin Organization: Data Protected
Admin Street: 123 Data Protected
Admin Street:
Admin Street:
Admin City: Toronto
Admin State/Province: ON
Admin Postal Code: M6K 3M1
Admin Country: CA
Admin Phone: +1.0000000000
Admin Phone Ext:
Admin Fax: +1.0000000000
Admin Fax Ext:
Admin Email: noreply@data-protected.net
Registry Tech ID: CB7B8C1A92B1D48D6A8BF9CD7EBA614BF-NSR
Tech Name: Data Protected Data Protected
Tech Organization: Data Protected
Tech Street: 123 Data Protected
Tech Street:
Tech Street:
Tech City: Toronto
Tech State/Province: ON
Tech Postal Code: M6K 3M1
Tech Country: CA
Tech Phone: +1.0000000000
Tech Phone Ext:
Tech Fax: +1.0000000000
Tech Fax Ext:
Tech Email: noreply@data-protected.net
Name Server: ns02.momentumtelecom.com
Name Server: ns01.momentumtelecom.com
Name Server: ns04.momentumtelecom.com
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
Last update of WHOIS database: 2026-04-26T18:42:44Z
For more information on Whois status codes, please visit https://icann.org/epp
.US WHOIS Complaint Tool - http://www.whoiscomplaints.us
Advanced WHOIS Instructions - http://whois.us/help.html
Registry Services, LLC, the Registry Administrator for .US, has collected this information for the WHOIS database through a .US-Accredited Registrar. This information is provided to you for informational purposes only and is designed to assist persons in determining contents of a domain name registration record in the registry database.
Registry Services, LLC makes this information available to you "as is" and does not guarantee its accuracy. By submitting a WHOIS query, you agree that you will use this data only for lawful purposes and that, under no circumstances will you use this data:
(1) to allow, enable, or otherwise support the transmission of mass unsolicited, commercial advertising or solicitations via direct mail, electronic mail, or by telephone;
(2) in contravention of any applicable data and privacy protection laws; or
(3) to enable high volume, automated, electronic processes that apply to the registry (or its systems).
Compilation, repackaging, dissemination, or other use of the WHOIS database in its entirety, or of a substantial portion thereof, is not allowed without our prior written permission.
We reserve the right to modify or change these conditions at any time without prior or subsequent notification of any kind. By executing this query, in any manner whatsoever, you agree to abide by these terms. NOTE: FAILURE TO LOCATE A RECORD IN THE WHOIS DATABASE IS NOT INDICATIVE OF THE AVAILABILITY OF A DOMAIN NAME. All domain names are subject to certain additional domain name registration rules. For details, please visit our site at www.whois.us.
This information was obtained from a different whois server, so we cannot verify its authenticity.
Registration Service Provider:
Momentum Telecom, systems@momentumtelecom.com
+1.8774401989
http://www.momentumtelecom.com
This company may be contacted for domain login/passwords,
DNS/Nameserver changes, and general domain support questions.
% Query time: 1356 msec
% WHEN: Sun Apr 26 18:42:42 UTC 2026
