How to Mark Mail as Spam in iOS Mail

Marking spam as junk tells iPhone email clients to update spam filters

Moving an email to the spam folder on an iPhone removes it from the folder it was in and notifies the email provider that the sender is delivering spam messages. The spam folder is called different names in different email clients; in the Mail app on iOS, it's called Junk. Marking an email as spam or moving it to the spam folder places the message in the Junk folder.

Instructions in this article apply to the Mail app for iPhone but might be adapted slightly to apply to other iPhone email programs.

Mark Emails as Junk on an iPhone

There are a few ways to move an email to the Junk folder on your phone. The method you choose depends on where you're at in the Mail app or how many emails you want to send to spam at one time.

In an open email message, tap the Folder icon, then choose Junk. The message is moved to the Junk folder.

Move an email message to the junk folder in iOS Mail

In the list of emails, tap Edit, select the emails to mark as spam, then choose either Mark > Move to Junk or Move > Junk.

Select several emails to mark as spam in iOS Mail

In the list of emails, swipe left on the junk email, then tap either More > Mark > Move to Junk or More > Move Message > Junk.

Move emails to junk folder in iOS Mail

What Happens When an Email Is Moved to Spam

iOS Mail can only move a spam email to the Junk folder if it knows about the spam folder for the email account. If the Junk folder doesn't exist on the email server, Mail creates it. The Mail app can identify the spam folder from email services such as iCloud MailGmail, Outlook Mail, Yahoo Mail, AOL, Zoho Mail, and Yandex Mail.

The effect of moving messages from the Inbox folder (or another location) to the Junk folder depends on how the email service interprets the action. Most email services treat messages that are moved to the Junk folder as a signal to update their spam filter to identify similar messages in the future.

The iOS Mail app doesn't come with spam filtering; it relies on the mail provider to filter spam appropriately.