# Discover mutuals **URL:** \ **Category:** Bots\ **Created:** [February 3, 2026, 4:29pm UTC](https://forum.delta.chat/t/discover-mutuals/4676 "2026-02-03T16:29:05Z")\ **Posts on this page:** 1\ **Showing post:** 4
**Author:** ![ian](https://forum.delta.chat/user_avatar/forum.delta.chat/ian/32/3164_2.png) [@ian](https://forum.delta.chat/u/ian)\ **Post date:** [February 3, 2026, 4:56pm UTC](https://forum.delta.chat/t/discover-mutuals/4676/4 "2026-02-03T16:56:22Z")
In that case, this is a duplicate of the following: > [@Contact-Lookup Service](https://support.delta.chat/t/contact-lookup-service/491): > > Hello there, please forgive me if this has already been widely discussed but I didn’t see it anywhere: I’d like to propose a lookup server (or actually confirmation server). Motivation I want a “phone book” in DeltaChat that shows me who I can contact, who will not just get an email but also “speak DeltaChat” When inspecting a contact on Android (surly on iOS too) I get hints what messengers that contact is using. That is how I usually decide how to contact another person. And I’d like t… > [@Search Server Adress Book](https://support.delta.chat/t/search-server-adress-book/588): > > A really nice feature, wich would separate DC from other Messengers, could be the function to pull matching emails from the server address book on contact search. I think this would be a huge benefit for companies and organizations and you can’t do on Whatsapp AFAIK Imap don’t support this (only exchange) but some email Clients just using LDAP or AD instead: [https://serverfault.com/questions/235447/getting-contact-list-from-imap-server](https://serverfault.com/questions/235447/getting-contact-list-from-imap-server) So this could be the way to go. Maybe allow it to be conf… > [@Search contacts by phone number](https://support.delta.chat/t/search-contacts-by-phone-number/3137): > > Introduction Yep, you heard it right. I know it’s a wild idea. But with Delta Chat becoming more and more normie-friendly (e.g. instant onboarding) I thought I’d shoot my shot. Why it’s important We know that practically every messenger including Signal uses phone numbers to look for contacts. All family members usually have each other’s phone number, unlike, let’s say, Instagram or Snapchat or email address. So when you aren’t, want to connect with you on a messenger, all you have to do is … > [@QuicksyServer: phone number directory lookup for email adresses?](https://support.delta.chat/t/quicksyserver-phone-number-directory-lookup-for-email-adresses/389): > > Some people seem to want address book matching, and Quicksy is a derivate of the Conversations XMPP App providing that feature. They also published the server code: As jabber IDs look the same as email addresses, there might even only be a patch needed when storing both on a shared server… > [@Welche Kontakte nutzen Delta Chat](https://support.delta.chat/t/welche-kontakte-nutzen-delta-chat/2023): > > Hallo zusammen, gibt es eine Einstellung, die anzeigt, welche meiner Kontakte bereits die Delta Chat App nutzt - also Delta Chat nicht als Email-Programm, sondern als Messenger? Besten Dank Gerhard --- _[View the full topic](https://forum.delta.chat/t/discover-mutuals/4676)._