As there can be numerous reasons causing an issue with the file attachment in your Yahoo Mail account, it can a bit difficult to overcome the problem. Some of the reasons responsible for file attachment issue are –exceeding size limit allowed, the file is in a restricted format, the file contains a virus, etc. In order to overcome the issue with a file attachment, you will need to fix the reasons causing it. If file size is the reason causing an issue, either you will need to compress the size or you will need to send I through other means such as cloud sharing. If the file is in a restricted format such as .exe, .bat, .apk, etc., you can try sending it by first zipping it. Similarly, fixing the reason causing the problem will allow you to fix the issue with file attachment in your Yahoo Mail account. If even after following the above-given workaround you are unable to overcome the issue, you can seek assistance from our Yahoo customer support experts via our toll-free customer care number, email, and live chat support. All our communication lines are open 24 by 7.