E-mail Marketing: Message Content Not The Only Hold-up For Marketers

To safeguard against having your e-mails wind up in spam folders or junk e-mailboxes, Pollard cautions against the heavy use of images, which can increase spam scores up to a full point and render poorly in e-mail clients with image blocking enabled. He also warns against having your return address consist of numbers or symbols rather than an actual name, since this also increases the likelihood the message will be flagged as spam and end up in junk/spam folders.