Assuming you are referring to the S/MIME feature in the Apple Mail app, and not a third party email client:
From the Home screen, tap Settings.
Tap Passwords & Accounts.
Tap the account that has S/MIME enabled. If you have multiple accounts, you may need to scroll down to find it.
Tap Account, then scroll down and tap Advanced.
Under Security, toggle off the S/MIME switch.
If you’re like most people, you probably use your iPhone for just about everything – email included. But what happens when you need to remove secure email from your device? Whether you’re trying to free up space or simply don’t need it anymore, here’s a quick and easy guide on how to remove secure email from your iPhone.
To start, open the Settings app and scroll down to the Mail, Contacts, Calendars section. Here, you’ll see a list of all the accounts that are currently synced with your device. Tap on the account that you want to remove, then scroll down and tap Delete Account.
You’ll be asked to confirm that you want to delete the account – tap Delete again and it will be removed from your device.
And that’s all there is to it! Just follow these simple steps and you’ll have no trouble removing secure email from your iPhone.

Credit: www.wired.co.uk
How Do I Delete Secure Email on Iphone?
When you delete an email from your iPhone, it doesn’t immediately disappear from the device. The message is moved to a trash folder, where it’s stored until you permanently delete it. This gives you a chance to change your mind and recover any messages that you accidentally deleted.
But if you’re sure that you want to get rid of a message for good, there are a few different ways to securely delete it.
One way to delete an email is to open the message and tap the trash can icon at the top of the screen. This will move the email into your Trash folder, where it will stay until you empty the trash or manually delete it.
You can also delete multiple emails at once by tapping Edit in the inbox view and then selecting the messages that you want to get rid of. Tap Delete when finished and those messages will be sent to your Trash folder as well.
If you want to permanently delete an email (or several) right away without having to go through your Trash folder first, there’s a way to do that too.
Just open up the Trash folder and tap Edit in the top-right corner of the screen. Then select all of the messages that you want to erase and tap Delete again. These emails will be gone for good!
How Do I Remove a Security Profile from My Iphone?
If you want to remove a security profile from your iPhone, there are a few different ways you can go about doing it. One way is to simply delete the security profile from your device. To do this, go to Settings > General > Profiles & Device Management.
From here, select the security profile that you want to remove and tap on the “Delete Profile” button.
Another way to remove a security profile from your iPhone is to reset your device to its factory default settings. This will erase all of the data and settings on your device, so be sure to back up anything important before proceeding.
To reset your iPhone, go to Settings > General > Reset > Erase All Content and Settings. Once your device has been reset, you’ll need to set it up as new and install any security profiles that you want again.
How Do You Change Email Security on Iphone?
Email security is important to protect your information from being accessed by unauthorized individuals. You can change the email security settings on your iPhone to help keep your information safe.
To change the email security settings on your iPhone, tap the Settings icon.
Then, tap Mail, Contacts, Calendars. Next, tap the account that you want to modify. Finally, under the Outgoing Mail Server section, tap SMTP and then choose one of the following options:
• SSL: This option will encrypt your outgoing mail using SSL.
• TLS: This option will encrypt your outgoing mail using TLS.
• STARTTLS: This option will upgrade an unencrypted connection to an encrypted one using STARTTLS.
How Do I Open Secure Email on Iphone?
There are a few different ways to open secure email on your iPhone. One way is to use the built-in Mail app that comes with your device. Another option is to download a third-party email app from the App Store.
If you’re using the built-in Mail app, you’ll need to make sure that your account is set up to use SSL encryption. To do this, open the Settings app and tap on “Mail, Contacts, Calendars.” Then, select your email account and tap on the “Account” tab.
Scroll down and make sure that the “SSL” switch is turned on. Once SSL is enabled, you should be able to open any secure email messages that you receive without any issues. If you’re using a third-party email app, check its settings to see if it supports SSL encryption.
Remove Email Account from Iphone
Assuming you would like a blog post discussing how to remove an email account from an iPhone:
“How to Remove an Email Account from Your iPhone”
We’ve all been there.
You set up your new iPhone with what you think is the perfect email account. But then, for whatever reason, that account just isn’t working out. Maybe it’s too slow, maybe you’re getting too much spam, or maybe you just don’t like the interface.
Whatever the case may be, if you find yourself wanting to delete an email account from your iPhone, here’s how to do it.
First, open the Settings app on your iPhone and scroll down until you see the Mail option. Tap on that and then select Accounts.
Here you’ll see all of the different email accounts that are currently associated with your device. To delete one of them, simply tap on it and then scroll down to the bottom of the next screen and tap Delete Account. Confirm that you want to delete the account and it will be removed from your device immediately.
How to Remove Email from Apple Id
Assuming you would like a blog post discussing how to remove an email from an Apple ID:
“How to Remove Email from Apple ID”
If you need to change the email address associated with your Apple ID, maybe because you changed jobs or providers, you can do so directly from your device.
Here’s how:
Open the Settings app on your iPhone or iPad. Tap your name at the top of the screen.
Select Name, Phone Numbers, Email. Tap Edit in the top right corner of the screen. Underneath the section labeled “Reachable At,” tap Delete next to the email address that you want to remove.
A pop-up window will appear asking if you’re sure you want to delete this email address. If you’re certain, select Delete; otherwise, tap Cancel.
Remove Email Account from Iphone 11
If you’re no longer using an email account on your iPhone 11 and want to remove it, follow these steps:
Open the Settings app. Scroll down and tap Passwords & Accounts.
Select the email account that you want to remove. Tap Delete Account. When prompted, tap Delete from My iPhone.
After you delete an email account from your iPhone 11, you won’t be able to send or receive emails using that account. All of the emails and other data associated with that account will also be removed from your device.
Mail Privacy Protection on Iphone
There are a few things you can do to help protect your privacy when using Mail on your iPhone. One is to disable the preview feature, which will prevent the subject and sender information from being displayed on the Lock screen. You can also choose to have messages deleted after a certain amount of time, and enable encrypting attachments.
Finally, be aware of what information you’re sharing in your email signature; consider removing any personal details that you don’t want made public.
Conclusion
If you’re using an iPhone and want to remove secure email, there are a few steps you can follow. First, open the Settings app and tap on Accounts & Passwords. Next, tap on the account that you want to remove secure email from.
Finally, scroll down to the bottom of the page and tap on Delete Account. Keep in mind that this will also delete any other data associated with that account, such as contacts and emails.