Thunderbird, a free, open-source desktop email client, lets users retrieve and read messages from a variety of email servers. One of Thunderbird's benefits for a small business is its ability to ...

Email is an enormously convenient communication tool, letting you quickly and easily keep in touch with anyone in the world as long that person has Internet access. Many emails messages only contain ...

You get an important email that has an attachment but when you attempt to open the attachment it won't open or it requests you to specify the program that will open it. First, almost all files have ...

You can select any of the above options. If you want to open the file, click Open. As explained above, this is not an error message. It is a warning message which can ...