What is DSN for and what does it do

Let me clarify a few things and offer some guidance:

1. DSN is an abbreviation for "Delivery Status Notification." It's not a tool or software that allows someone to read and forward your emails. Instead, it's a system used by email servers to notify the sender of an email about the delivery status of the message. These notifications usually inform you whether your email was successfully delivered, delayed, or not delivered at all. DSN is not related to email interception or forwarding.
2. If you suspect that someone is accessing your email account without your permission, it's important to take steps to secure your email and investigate the issue further:
   1. Start by changing the password for your email account. Make sure it's a strong, unique password that's not easily guessable.
   2. If your email service offers 2FA, enable it. This adds an extra layer of security to your account.
   3. Review your email account settings for any unfamiliar devices or IP addresses that have accessed your account. Many email providers offer security features that allow you to see recent account activity.
   4. If you continue to have concerns or evidence of unauthorized access, contact your email provider's customer support for assistance.
3. Seek Help from a Tech-Savvy Friend or Professional: If you're not familiar with computers and the internet, it's a good idea to seek assistance from someone who is tech-savvy, like a friend or family member, or even consider consulting a professional if you suspect malicious activity.

Remember, it's important to take email security seriously, as unauthorized access to your email can lead to various issues. Be cautious and follow best practices to keep your online accounts secure.

Which email account are you referring to? Google, iCloud, AOL, Exchange, Outlook, Yahoo or any Other (Refer to the pic )below

1. Is this your corporate iPhone? Then please contact the system administrator of your corporate
2. If it is your personal device, in that case, do you have any profile installed by your corporate/organisation/enterprise/School Management?
   1. Erase the profile added by you If you have installed a profile on your own --> Install or remove configuration profiles on iPhone - Apple ...
   2. Or please contact the system administrator of the organisation who provided the profile to you

You may enable two step verification on Google --> Sign in with App Passwords - Google Account Help

You may enable Authenticator for Yahoo --> Generate and manage third-party app passwords | Yahoo Help

You may enble 2-step verification for Outlook --> Manage app passwords for two-step verification

You may activate 2-step verification for Aol --> Create and manage third-party app passwords - AOL Help