There can be several reasons why your emails go to spam for various receivers:
Your content is being detected as spam-like
You are not using a reliable method to send emails
Check the below suggestions to prevent your emails from ending up in the spam inbox.
Option 1 – Ask your clients to mark your emails as “Not spam”
You can ask the recipients themselves to mark the emails you’ve sent as Not spam. Once they do that, emails from you won’t end up in their spam inbox ever again.
Option 2 – Add DNS verification
All modern mail services use additional verification of the sender to check that a letter is really sent from the particular address. Such a check takes time, and the message may be marked as spam if it does not pass the verification.
To help your domain pass such checks, you just need to add two types of DNS records: SPF and DKIM (they're called SPF and DKIM, but you should simply add them as TXT records).
You can get these records from your email service provider. For example, if you use Zyro's Titan email, you'll set up SPF and DKIM records by following these steps.
Option 3 – Check the email’s subject
One of the most common things that prevent emails from being delivered is their subject. It is better to avoid using the following in your subject line:
The words “Test”, “Check” or similar
Phrases like “Open this letter”, “Read me”, “URGENT” or similar
A random set of letters or numbers
Additional recommendations for the content of the subject line:
It is better not to write the topic in ALL CAPITAL LETTERS
The subject line of the letter should correspond to its text
Do not try to fit the entire text of the letter into the subject – it should be short (but not just a single word like “Hello” either); don't leave the subject blank
Don't use special characters (like % ^ >)
Do not add “Re:” to reply to a message
Examples of bad subject lines: “READ”, “siknvdjhvbls”, “Re:”
Examples of good subject lines: “Information about your order for ceiling tiles”, “Orchid exhibit this Friday”
These tips will help you to create a subject line that will be more positively accepted not only by mail services but also by your recipients 😊
Option 4 – Improve deliverability with a Mail tester
And finally, the content of your email. To check how good your email is, please visit MailTester. All you will need to do is:
Send a message (exactly the same that you would like to send to a client or another recipient) to the temporary address indicated on the screen
Follow the recommendations