How to troubleshoot mail errors
In this tutorial, we will try to troubleshoot/resolve mailing errors on your hosting account :
A) If you are using SiteCountry Nameservers :
This section is for you if you are using SiteCountry nameservers, if you are using third party Nameservers/DNS like Cloudflare, Quic, Ezoic, etc head over to section B
Step 1 ) Enable DKIM
The first step would be to check if you have DKIM enabled for your email accounts for better mail delivery. To do so, go to your hosting control panel > email accounts > select all email accounts and Click on Enable DKIM. Refer to the attached screenshot.

Once DKIM is enabled, wait for 10-15 minutes and check if the mails deliver fine now.
Step 2 : Ensure DNS records are present.
First of all select the affected domain name from the top bar . Then head over to the DNS Management section as shown

Ensure that you have records shown below, the value of the records will be different, so you would have to just verify that the records are actually present.

If all the records are present and you are still facing the mailing issue, here are other reasons :
1) If you get an error like : This user has sent too many emails while sending the mails, this means that your email accounts have crossed the daily mail sending limits. If you believe that you have not actually sent the emails, you should immediately reset the email passwords and most importantly, check your website for any contact form abuse. Its important that you should enable captcha for your contact form to prevent mail abuse which can be easily done with a simple plugin in wordpress, for example : https://wordpress.org/plugins/contact-form-7-simple-recaptcha/
2) If you get 550 errors, or any other error while sending or receiving mails, you can reach out to our technical support team for help by raising a support ticket from your client area. Our team would get back to you as soon as they can.
Need a more reliable mailing solution? Try our Dedicated Email Hosting packages : https://www.sitecountry.com/email-hosting/
with 100% mail uptime and highest mail delivery.
B) If you are using Third Party/Other Nameservers :
If you are not using SiteCountry's nameservers, please follow these steps.
Step 1) Make sure that the DNS records present in DNS management section of control panel are present on your Cloudflare Dashboard DNS page.
For mailing, the TXT, MX Records are the one that needs to be properly configured.
If you are still encountering issues, you can reach out to our support team for help anytime.