- What do the symbols next to a message mean?
- Why do messages to certain contacts not appear as read?
- How can I tell whether the app is connected to the server?
- Why are incoming messages sometimes delayed or only arrive once I open the app?
- How can I send emojis?
- Why don't previews in push notifications work properly?
- Why doesn’t my chat partner receive my messages?
- How can I make sure this is working when I don't know anybody who has installed it yet?
- How long do messages stay in queue for delivery?
- I am receiving unwanted messages. What can I do?
- Why can't I send a video?
- How can I mute individual chats?
- What does it cost to send a message?
- Which ports need to be open on my network?
I am receiving unwanted messages. What can I do?
Block single users
If you receive unwanted messages from another Threema user, you can block them:
- Android: Open the contact details by tapping the contact's profile picture. Then, navigate to “Block contact” in the side menu. Alternatively, you can add the contact’s Threema-ID to the blacklist in “Threema > Settings > Privacy > Blacklist.”
- iOS: Tap the contact in the contact list and scroll down to the option “Block contact”.
A blocked contact doesn't see if he or she is blocked.
Threema allows you to block messages from unknown users in general. You will find this option in “Threema > Settings > Privacy > Block unknown”.
Please note: When the option “Block unknown” is enabled, you might not receive messages from your friends if you didn't save their details in your address book or if they didn't link an email address or phone number to their Threema ID. This could make them believe that the sending of messages isn't working properly.
Specific contacts can be excluded from your contact list by using “Threema > Settings > Privacy > Exclusion list”.