My messages go to the Spam folder

This likely has to do with your content of your message.
Mail Tester is not really a good guage if your going to inbox or not.
Try using a service like email on acid, or glock apps to get some more suggestions on how you can adjust your content to have a better chance of inboxing.

There's a better site to use to check each email for the spam elements. I'll have to dig through my links to find that.

What i did starting out was to send a test email to gmail and hotmail, check if they're inboxing correctly, then just check "not spam" for each email.

That sort of corrected the spam element for each of those emails for that particular send (doesn't affect all emails - needs to be done for each one individually).

If you do a tester for each email and ensure it inboxes, you should generally get a higher inboxing rate.

I have also found that gmail and hotmail are the best for this. Yahoo doesn't really play a part.

I would agree with producerK, in my experience, the issue is usually in the body of the email and or the subject line.

Here's a few best practices tips that I learned from my own testing:

Be VERY careful when using numbers in your subject line. In my recent testing, any sort of number in the subject line almost always causes the email to go to spam/promotions tab. There are a few times when it won't cause it, but 3 out of 4 times, I've seen it will cause issues.

Instead of writing numbers like 7 in your subject line, do "seven" instead for example.

What you write in your subject line and in first few lines of the body is definitely something to pay attention to.

In the body, things like your font size can cause issues. Don't make your font size too big. The next big thing that will almost certainly cause emails to go to promo is using too many links. In my testing, I've noticed that using 3 or more will cause my emails to go to promo. In my opinion, I wouldn't use more than 2 links max in the body, no more than that. If you write your copy well enough, 2 links should be enough to get click throughs

Hope this helps!

Use Get Response software it is one of the best email marketing tool. You will get first 30 days trial then you have to purchase their services as per your requirements.And it avoid mails to drop into spam folder of customers.

Why emails go into the spam folder?
Check this out. You might get a clue.

Optimize your email content and tell subscribers to add you to their whitelist. Here is a link to a helpful article by Neil Patel: https://blog.kissmetrics.com/avoid-the-spam-folder

Try to review the body of your letter. I had this issue before, but once I did reconstruct it, it solved the problem.

Not only content is important even your subject lines also matter.

I have a question -
1. Have you send email when they first opt-in ? Like welcome email if not first problem arise.
2. If you buy subscribers from solo vendors, their Bounce rate is high compare from paid campaign or organic traffic. and many thing could be happen
See The Ultimate List of Email SPAM Trigger Words from Hubpost
https://blog.hubspot.com/blog/tabid/...ger-Words.aspx

I'd use a different autoresponder, one that isn't as well known so won't be marked into spam

Try to use whitelist function to avoid spam

1. Confirm emails
2. Get whitelisted
3. Don't use numbers (1) on subject use words for numbers (one)
4. Engage your subscribers and trigger them to send you an email (winner!)
5. Cloak affiliate links