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Tips when sending to Yahoo! Mail ends up as spam

2016.07.29

Server construction/operation

table of contents

1 DNSBL check
2 Open relay server check
3 Check SPF record
4 Yahoo! Mail blacklist removal request

This is Haraoka from Beyond.

I'm having a bit of trouble, so I'd like to make a note of what to do when an email sent to Yahoo! Mail ends up as spam.
When I sent an email to a customer from a certain content, I didn't receive a reply, so I checked and found out that it seemed to have gone into my spam folder.

DNSBL check

First, check the DNS blacklist.
http://www.dnsbl.info/dnsbl-database-check.php

Open relay server check

Check to see if it is being relayed to a third party (stepping stone)
http://www.rbl.jp/svcheck.php

Check SPF record

Make sure your DNS SPF records are properly configured.
http://mxtoolbox.com/spf.aspx

Yahoo! Mail blacklist removal request

This time, there seemed to be no problems with any of the checks ① to ③. When I looked closely at the header, X-YahooFilteredBulk ", so I checked and it seems like I was caught on Yahoo! Mail's blacklist.

It's a mystery as to why it was flagged as the content was not sent much, but if you ask Yahoo Mail's customer service to remove the blacklist, they will take care of it.

http://ms.yahoo.co.jp/bin/mail-ms/feedback

*A confirmation will be displayed first, so you can make inquiries from the page that changes by clicking "Next".

This time, I received the email safely within 30 minutes after making the request.

So for your reference.

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[2025.6.30 Amazon Linux 2 support ended] Amazon Linux server migration solution

The person who wrote this article

About the author

Masahiro Haraoka

I am the representative director of Beyond Co., Ltd.

Oracle DBA (taking care of DB on UNIX, Linux, Windows Sever)
⇒Linux engineer (constructing and operating servers, FW, L3, etc. in DC)
⇒Cloud engineer (multi-cloud AWS, GCP, Azure, etc.)
⇒Manager

My hobby is reading. I read everything, including manga, online novels, and business books. I recently started solo camping.

[Android] Before playing Pokemon Go! Save packet traffic with Opera Max It seems that Google Cloud Platform (GCP) will establish a Japanese subsidiary, so I will introduce the components of GCP.