A no-no for networking events is taking business cards and adding your new potential contact to your email marketing list list. Oftentimes bulk emails will go directly to someone’s spam folder. Your domain name and email may be marked as spammers so ALL messages that you send might sent to your contact’s spam box – not their inbox.
A great way to add someone is to ask them to add themselves. Include a link to signup in your email signature. When sending individual emails, you promote the opt-in to your business contacts.