Following steps should be taken to prevent mail from ending in SPAM:
- Check if your domain name has been blacklisted.
- If you are using html, then html should be well coded.
- Avoid using spam filtering words, punctuation or capital letters message in your content/subject.
- Spam filters look to see how many messages you are sending at a time.
- Encourage your receiver to add you as friend or contact.
- Keep the length of your subject under 45 characters.
- Don’t use lots of colored fonts.
- Only use one exclamation point at a time!
- Avoid using the phrases “to unsubscribe” and “to be removed” in your message body.
- 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.