Is Mozilla Mail susceptible to e-mail viruses?
Mozilla Mail will not allow a virus or worm to execute automatically. You can see what attachments have been sent to you without a virus being able to execute, and you would have to save a file to your system and deliberately run it before it could cause any harm. JavaScript is switched off by default for mail and news, so an e-mail cannot run script code just by being opened. As with any mail program, take proper caution before running any file that you receive in e-mail. Appropriate anti-virus software should also help keep you safer.