Tips for when your Yahoo! Mail emails end up in spam

This is Haraoka from Beyond

I'm making a note of this because I encountered a bit of trouble with how to deal with emails being marked as spam when sent to Yahoo! Mail.
I sent an email to a customer from a certain content provider, but received no reply, so I checked to see if it had ended up in their spam folder.

DNSBL Check

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

Check for open relay servers

This checks whether your data is being relayed to a third party (used as a stepping stone)
: http://www.rbl.jp/svcheck.php

SPF record check

Verify that the DNS SPF record is properly configured.
http://mxtoolbox.com/spf.aspx

Request to remove Yahoo! Mail from blacklist

This time, none of the checks from ① to ③ seemed to have any problems. However, upon closer inspection of the header, I noticed"X-YahooFilteredBulk," and it appears that I had been flagged on Yahoo! Mail's 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