If you're just starting out and don't know what an autoresponder is I'll explain real fast;
An autoresponder a paid service you use which lets you build an email marketing list and they send out the bulk emails for you.
(You'll get in trouble fast if you try to email lots of people yourself from Gmail or Outlook etc.)
An autoresponder does all this for you.
Now what you need to know is many autoresponders will have different servers they use to send emails from.
Think about it;
They may have thousands, or even hundreds of thousands of clients.
And each one of those clients could be sending hundreds of thousands of emails.
Because of this the autoresponder companies are in a constant battle and in communication with the likes of Gmail, Hotmail and other email providers to make sure their messages go to the inbox and not spam.
The email providers therefore ask the autoresponders to jump through a lot of hoops to make sure their emails are legitimate and follow all spam regulations.
This is why the autoresponder you use should include things like a spam checker, an inbox preview tool, and so on.
I use the Getresponse autoresponder, which in my opinion is the best autoresponder on the market (and you can get a 30-day free trial to start).
It includes these spam-checking tools and a way to preview and test all your emails, before you broadcast them live.
An insider secret you need to know is that autoresponders put different clients on different email servers.
This sounds technical, but all you need to know is;
If you're getting good engagement with your emails (i.e. people are opening them, reading them, clicking them and especially replying to them) then you will be put on the good server by the autoresponders.
Autoresponders have their favourite servers, which are held in high esteem by the email providers like Gmail.
This means any clients who are on the good server and send out emails are more likely to get those emails into the inbox, rather than spam or trash.
"If your emails have low engagement, and people are not replying to them, not opening them, not reading them and not clicking then your entire autoresponder account is likely to be put on the less-valued server."