Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

why does a black vertical box appear on my email messages in outlook online? It blocks text. It has a "close" button on it that is not active. Please help!

more options

some messages that I receive via outlook have a vertical black box on the right side of the screen that blocks text. It is only true in firefox. it may be related to screenshots in the mail itself or to attachments.

some messages that I receive via outlook have a vertical black box on the right side of the screen that blocks text. It is only true in firefox. it may be related to screenshots in the mail itself or to attachments.

All Replies (1)

more options

Could it be a vertical advertisement that you are partially blocking? Maybe a screenshot would be helpful. You can attach an image to a reply using the "Browse" button below the compose area.