DKIM/SPF Checker

DKIM/SPF Checker can help you check your DKIM and SPF settings through Gmail, Hotmail and Yahoo mail server. The DKIM/SPF Gmail, Hotmail and Yahoo checking results are for referrences only.

Please send the email with subject 'DKIM/SPF Check Request' to any of the following email address, and reload DKIM/SPF Checking Results after couple of minutes. Click the DKIM/SPF Results to see the detailed mail server Authentication-Results, the description of DKIK/SPF Authentication-Results from Gmail, Hotmail and Yahoo are not exact same.

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Recent DKIM/SPF Checking Results

Email	Checked On(EST)	Mail Server	DKIM Results	SPF Results
fe*@nt*.com	9/25/2023 2:21:34 AM	Hotmail	Fail spf=temperror (sender IP is 111...14) smtp.mailfrom=nt*.com; dkim=timeout (key query timeout) header.d=nt.com;dmarc=temperror action=none header.from=nt**.com;	Fail TempError (protection.outlook.com: error in processing during lookup of nt***.com: DNS Timeout)
do*@cs*.com.cn	9/19/2023 1:36:12 AM	Hotmail	Fail spf=pass (sender IP is 107...249) smtp.mailfrom=cs*.cn; dkim=test (signature was verified) header.d=cs.cn;dmarc=pass action=none header.from=cs**.cn;compauth=pass reason=100	Pass Pass (protection.outlook.com: domain of cs*.cn designates 107...249 as permitted sender) receiver=protection.outlook.com; client-ip=107..**.249; helo=vip3.whitelist.crbl.net; pr=C
wa*@to*.com	9/14/2023 5:07:27 AM	Hotmail	Pass spf=permerror (sender IP is 103...235) smtp.mailfrom=to*.com; dkim=pass (signature was verified) header.d=to.com;dmarc=pass action=none header.from=to**.com;compauth=pass reason=100	Fail PermError (protection.outlook.com: domain of to***.com used an invalid SPF mechanism)
ct*@ct*.com	8/17/2023 9:16:19 AM	Hotmail	Pass spf=pass (sender IP is 136...8) smtp.mailfrom=ct*.com; dkim=pass (signature was verified) header.d=ct.com;dmarc=pass action=none header.from=ct**.com;compauth=pass reason=100	Pass Pass (protection.outlook.com: domain of ct*.com designates 136...8 as permitted sender) receiver=protection.outlook.com; client-ip=136..**.8; helo=sender4-zs8.zoho.com; pr=C
ma*@bo*.com	8/10/2023 10:10:16 PM	Hotmail	Fail spf=pass (sender IP is 43...173) smtp.mailfrom=bo*.com; dkim=none (message not signed) header.d=none;dmarc=bestguesspass action=none header.from=bo*.com;compauth=pass reason=109	Pass Pass (protection.outlook.com: domain of bo*.com designates 43...173 as permitted sender) receiver=protection.outlook.com; client-ip=43..**.173; helo=bg5.exmail.qq.com; pr=C
ma*@bo*.com	8/10/2023 9:37:25 PM	Yahoo	Fail atlas101.free.mail.bf1.yahoo.com; dkim=unknown; spf=none smtp.mailfrom=bo*.com; dmarc=unknown header.from=bo*.com;	Fail none (domain of bo***.com does not designate permitted sender hosts)
li*@gm*.com	7/25/2023 9:18:35 PM	Yahoo	Pass atlas307.free.mail.ne1.yahoo.com; dkim=pass header.i=@gm*.com header.s=20221208; spf=pass smtp.mailfrom=gm.com; dmarc=pass(p=NONE,sp=QUARANTINE) header.from=gm**.com;	Pass pass (domain of gm*.com designates 209..**.42 as permitted sender)
li*@gm*.com	7/25/2023 9:18:35 PM	Hotmail	Pass spf=pass (sender IP is 209...53) smtp.mailfrom=gm*.com; dkim=pass (signature was verified) header.d=gm.com;dmarc=pass action=none header.from=gm**.com;compauth=pass reason=100	Pass Pass (protection.outlook.com: domain of gm*.com designates 209...53 as permitted sender) receiver=protection.outlook.com; client-ip=209..**.53; helo=mail-ed1-f53.google.com; pr=C
li*@gm*.com	7/25/2023 9:18:35 PM	Yahoo	Pass atlas307.free.mail.ne1.yahoo.com; dkim=pass header.i=@gm*.com header.s=20221208; spf=pass smtp.mailfrom=gm.com; dmarc=pass(p=NONE,sp=QUARANTINE) header.from=gm**.com;	Pass pass (domain of gm*.com designates 209..**.42 as permitted sender)

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If you have any question or feedback, please email us to let us know.

DomainKeys Identified Mail (DKIM) is an email authentication method designed to detect email spoofing. It allows the receiver to check that an email claimed to have come from a specific domain was indeed authorized by the owner of that domain.

Sender Policy Framework (SPF) is an email validation protocol designed to detect and block email spoofing by providing a mechanism to allow receiving mail exchangers to verify that incoming mail from a domain comes from an IP Address authorized by that domain's administrators.

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