Undo Mark junk text message

Hello MamiMart,

Thanks for posting in the Apple Support Communities. We're happy to look into this with you. We understand that you have concerns regarding marking a message as junk. To clarify, you referring to a message in the Messages app, right?

You'll still receive messages from this contact. The only way they would be "blocked" is if you followed the actions provided in article, Block, filter, and report messages on iPhone - Apple Support under section: Block messages from a specific person or number.

Below are the details provided about reporting messages you receive in the Messages app, from the article above.

Report spam or junk messages

When you use iMessage, you can report spam messages to Apple. Depending on your carrier and country or region, you can also report spam you receive with SMS and MMS.

In the list of messages, touch and hold the spam message, then tap Report Junk. Or, if you’ve opened the message, scroll to the bottom of the message, tap Report Junk, then tap Delete and Report Junk.

The sender’s information and the message are sent to Apple, and the message is permanently deleted from your device.

Note: Reporting junk or spam doesn’t prevent the sender from sending messages, but you can block the number to stop receiving them.

If you don’t see the option to report spam or junk messages you receive with SMS or MMS, contact your carrier. See the Apple Support article Wireless carrier support and features for iPhone.

Best regards.