"垃圾邮件"用英语怎么说啊?

spam（计算机专业） 和jumk mail(口语）此二种有资料：

As well as guarding against viruses, it includes: E-mail filtering, which controls incoming e-mail that contains spam, file attachments that are too large or hoax e-mails.
关于防病毒方面，它具有：电子邮件过滤，由它来控制含有不请自来的广告邮件、太大的附加文件或者戏弄邮件的进入。
Because of junk e-mail, people are getting increasingly skeptical about what's happening with the information they provide to some Web sites.
由于大量乱寄的电子邮件，人们越来越多地怀疑他们向某些网站提供的信息将发生的后果

垃圾邮件 Junk mail

Even with that come on, millions of computer savvy people would likely have ignored it as junk mail from an unknown sender.
不过即使面对这样的引诱，数以百万计深谙计算机的电脑使用者也很可能将其看作是从某位不知名的发送者发来的垃圾邮件而不予理睬。

rubbish email

junk mail

junk mail

spam