messg spam from my office email to yahoo

My response from Yahoo (now Verizon Small Business):

I understand that legitimate emails are going to "Spam" folder. I extend my sincere apology for the issue caused to you however, please be assured, I will certainly assist you with the right information.

Please be informed, our "Spam" feature doesn't put the emails to "Spam" folder unless it is a Spam email. The emails which are sent to "Spam" folder are the emails which are reported as "Spam" and which are "Spam" by its nature which is scrutinized and filtered by our Email server. They are unsolicited email messages, usually sent in bulk to a large list of recipients. For example, promotional emails, bulk emails, unidentified email addresses which are reported as "Spam". Every email server detects such emails and they will be put to "Spam".

Furthermore, the legitimate emails which are going to "Spam" folder is a temporary technical issue. If the sender is using Microsoft hosted email clients then due to abuse, they are facing trouble sending emails. To help resolve the problem our email service let them deliver the emails but is going to Spam folder. Please note, if sender is using any other email client or our Webmail then this issue is not occurring.

Understanding the urgency of the issue our Engineering team is coordinating with "Microsoft" in order to fix this issue as fast as possible and I assure you this issue can be fixed any moment.

We are available 24/7 for your service and we sincerely appreciate your Business with us. We look forward to assist you in future.