MxToolbox Header Analyzer

online Free

mxtoolbox.com

🇺🇸 United States

Quick Facts

Open Source

Yes

Platforms

web

API Available

yes

Account

Optional

Skill Level

beginner

Offline Capable

Yes

Output Formats

html

Rate Limits

varies by plan

What it does

Parses email headers according to RFC 822 standards to show complete email routing path, delays between servers, and authentication results (SPF, DKIM, DMARC). Automatically checks sending domains against blacklists. Part of MxToolbox suite of email diagnostic tools.

When to use it

Investigating email delivery issues
Analyzing phishing email origins
Checking SPF/DKIM/DMARC results
Identifying email delays

When not to use it

Full phishing analysis (use PhishTool)
Attachment analysis
Automated processing

Limitations

Header parsing only—no attachment analysis
Manual input required
Some features require paid account

Frequently Asked Questions

Is MxToolbox Header Analyzer free to use?

Yes, MxToolbox Header Analyzer is completely free to use with no subscription required.

What platforms does MxToolbox Header Analyzer support?

MxToolbox Header Analyzer is available on Web (browser).

What are the rate limits for MxToolbox Header Analyzer?

MxToolbox Header Analyzer has a rate limit of varies by plan.

Does MxToolbox Header Analyzer require an account?

An account is optional for MxToolbox Header Analyzer. You can use basic features without one.

Is MxToolbox Header Analyzer open source?

Yes, MxToolbox Header Analyzer is open source.

What are the limitations of MxToolbox Header Analyzer?

Header parsing only—no attachment analysis Manual input required Some features require paid account

What does MxToolbox Header Analyzer do?

MxToolbox Header Analyzer is a web-based tool for email & phishing analysis. Parses email headers according to RFC 822 standards to show complete email routing path, delays between servers, and authentication results (SPF, DKIM, DMARC). Automatically checks sending domains aga

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