Tips when sending to Yahoo! Mail ends up as spam

This is Haraoka from Beyond.

I'm writing this note because I'm having a bit of trouble with what to do when an email sent to Yahoo! Mail ends up in spam.
I sent an email to a customer from a certain content, but there was no reply, so I thought it must have ended up in spam.

DNSBL Check

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

Check for open relay servers

We check to see if your connection is being relayed to a third party (as a springboard)
http://www.rbl.jp/svcheck.php

SPF record check

Make sure your DNS SPF record is properly configured:
http://mxtoolbox.com/spf.aspx

Request to remove Yahoo! Mail from blacklist

This time, there seemed to be no problem with any of the checks ① to ③. When I looked closely at the header, I X-YahooFilteredBulk , so I checked and it seemed that the email had been caught on the Yahoo! Mail blacklist.

Since I don't send emails to this content very often, it's a mystery why it was caught, but if you request Yahoo Mail customer service to remove it from the blacklist, they will take care of it

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

*A confirmation will be displayed first, and you can make an inquiry from the page where you will be redirected by clicking "Next"

This time, the email arrived safely within about 30 minutes of making the request

So just for your reference