Your software is not configured for the correct Domain Name address. An attachment is a way of sending documents or programs by email by encoding the item as text and attaching it to an ordinary email message. Look for the attachment option in your email application. The most common form of encoding attachments is uuencoding, MIME or binhex. If you receive an unsolicited email which contains an attachment that you decode and then use, the resulting binary code may contain a virus.
Some companies collect and sell for profit e-mail addresses.
This information may be acquired from a variety of sources such as publications, business cards, phone calls and from your own Web browser Companies on the internet are able to collect your email address from your Web browser when you visit their web site. Change your email address. This can be drastic as it maybe your business contact address maybe better to try 2 below 2. Acquire an advanced email client which contains mail filtering rules that will delete any email that contains words or addresses that you define as unsolicted email. I am about to get a new computer which will come loaded with Windows 95.