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  6. [Blog] Fixing "SPF alignment failed"

[Blog] Fixing "SPF alignment failed"

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last updated:Nov 25, 2025

Spelldata
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Understanding SPF Alignment! Here's how to fix "SPF alignment failed"!

To protect your domain and online identity from fraudsters attempting to impersonate you, it is necessary to set up DMARC for your email domain. DMARC functions through a cumulative email authentication effort involving the SPF and DKIM protocols. Additionally, DMARC users benefit from receiving reports regarding email delivery issues, authentication, and alignment failures. If the DMARC aggregate report states "SPF alignment failed," I will explain what SPF alignment is and how to resolve this issue. [Contents] ■ What is SPF alignment? ■ Why does SPF alignment fail? ■ How to fix "SPF alignment failed" *You can view the detailed content of the blog through the related links. For more information, please feel free to contact us.

    Server monitoring and network management toolsOther server relatedOther security
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[Blog] Fixing "SPF alignment failed"

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  • Related Link - https://maildata.jp/blog/blog-2021-12-13.html
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Spelldata

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We have established and operate measurement and monitoring centers in five cities across the country (Sapporo, Niigata, Tokyo, Osaka, and Fukuoka). The measurement and monitoring systems in operation there are also used by major IT companies such as Google and Microsoft, as well as e-commerce sites and mobile companies like Verizon. We monitor the communication status of your web systems from various locations 24/7, analyze the data, optimize it, and support high-speed and stable web operations. We can detect communication failures and server issues, which have been occurring frequently lately, through measurements from across the country and immediately raise alerts. Additionally, we provide a web performance tuning service that ensures the display speed of websites, web applications, and mobile applications is completed within one second nationwide, achieving a 98% yield. Based on statistical quality control, we conduct data collection and analysis, and guarantee the achievement of displaying within one second through genuine performance tuning that addresses issues from the source code. Please feel free to contact us if you have any requests.

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