Following steps should be taken to prevent mail from ending in SPAM :

1. Check if your domain NAME has been blacklisted.
2. If you are using html, then html should be well coded.
3. Avoid using spam filtering words, punctuation or capital letters message in your content/subject.
4. Spam filters look to see how many messages you are sending at a time.
5. Encourage your RECEIVER to add you as friend or contact.
6. Keep the length of your subject under 45 characters.
7. Don’t use lots of colored fonts.
8. Only use one exclamation point at a time!
9. Avoid using the phrases "to unsubscribe" and "to be removed" in your message body.
10. If you want to deliver an important message to multiple groups better use the ‘BCC’ function.

Most, if not all, EMAIL providers’ spam filters PENALIZE your domain or IP with a higher spam SCORE (meaning there’s a higher possibility of your emails going to junk folder) if they see that you are sending emails to bad email accounts. A bad email account is an address that doesn’t exist, has been disabled or has a full inbox.

Following steps should be taken to prevent mail from ending in SPAM :

Most, if not all, email providers’ spam filters penalize your domain or IP with a higher spam score (meaning there’s a higher possibility of your emails going to junk folder) if they see that you are sending emails to bad email accounts. A bad email account is an address that doesn’t exist, has been disabled or has a full inbox.