So, why can’t you just paste emails into that ‘blind copy’ box in gmail and go about your emailing?
What a great question!
The short answer: your emails will not be delivered.
There are blocks in place to prevent people from sending hundreds or thousands of emails at a time. Somehow it doesn’t seem to do enough – I still have a spam box that is overflowing. Nevertheless, your emails won’t be delivered if you send from a regular email address.
The only way to participate in mass emailing, ie: email marketing, is to use an email marketing service. They are ‘whitelisted’ with most email inboxes because they insist that their users follow a few rules:
For beginners, I recommend Mailchimp because it is free.
A lot of people are now switching to email marketing programs that also provide easy-to-create opt-in forms. Convert Kit and Lead Pages are two of the popular ones. These companies generally provide easy segmentation and autoresponders as well.
A lot of people leave Mailchimp because they assume that the segmentation and auto-responders aren’t as robust as the other guys, but that’s not true. The segmentation and easy automation features are fairly new but definitely available.