What's the maximum file size I can send as an attachment using BT Yahoo! Mail?

The maximum email size is set at 25MB for your BT Yahoo! email account. However, you may find it hard to send attachments that are larger than about 20MB as attachments must be encoded so that other email programs can read them. Encoding attachments can add about 33% to their original size. So a 1.5MB attachment would be roughly 2MB after encoding.

If you need to send large files you can try these alternatives:

Zip up your files before you email them

Single or multiple files can be compressed with utility programs such as WinZip or Stuffit. Depending on the file, you can often reduce the file size a great deal.

Transferring files online

Using an online backup and storage site like BT Digital Vault is an easy way to share extremely large files - up to 1Gb - with your family and friends. BT Total Broadband customers can set up a free BT Digital Vault account to start sharing files online at no additional cost.

Sign-up to BT Digital Vault now.

Other services and tools

There are a variety of other services and tools that allow you to transfer extremely large files, up to 1Gb. Do a search on the web and you should be able to find one for free.