If you find any difficulty to attach file in yahoo email, get quick solution here by following the post below. There may be many reasons for not being an email send. Just find solution here.
1) If your attachment contains any special characters such as: slashes, hash tag dollar sign etc then surely you are not able to send any kind of attachment. And if you exceed the size limit of attachment then also you find this type of problem.
2) Make sure, never send any type of encrypted files in your yahoo mail because yahoo didn’t except this type of files.
3) Sometime browser problem becomes the main issue that’s why user is not able to send attachment. So, before sending the file or attachment double check your web browser. If you want perfect mailing then always prefer perfect browsers such as: internet explorer, safari, Google chrome etc.
4) If you want to send the attachment but can’t then surely the problem is related with your internet. Immediately contact to your internet service provider and solve your all issue regarding internet.
5) Sometime due to antivirus issue you didn’t send any file, so temporarily turn off your antivirus and try to send the file and attachment. Hope it works.