# LAN-decentralized-no-internet setup: mDNS + SMTP-server (postfix) + delta.chat (+ IMAP-server (dovecot)?) **URL:** \ **Category:** Mutual Help\ **Created:** [August 26, 2019, 8:19pm UTC](https://support.delta.chat/t/lan-decentralized-no-internet-setup-mdns-smtp-server-postfix-delta-chat-imap-server-dovecot/583 "2019-08-26T20:19:22Z")\ **Posts on this page:** 1\ **Showing post:** 10
**Author:** ![link2xt](https://support.delta.chat/user_avatar/support.delta.chat/link2xt/32/1971_2.png) [@link2xt](https://support.delta.chat/u/link2xt)\ **Post date:** [February 24, 2021, 12:48am UTC](https://support.delta.chat/t/lan-decentralized-no-internet-setup-mdns-smtp-server-postfix-delta-chat-imap-server-dovecot/583/10 "2021-02-24T00:48:33Z")
The problem with running email server on mobile is that it will be unavailable whenever the user does not have a connection, making it impossible to deliver message in their inbox. One more or less practical solution I see is to add support for `.onion` domains and a simple dockerized setup that allows to run such server without the problems of registering a domain, populating DNS records, getting a TLS certificate and so on. Such servers will normally be able to speak only to other `.onion` servers, but with multi-account support you can run such experimental DC server in addition to your main account. See related topic: [Delta chat through tor?](https://support.delta.chat/t/delta-chat-through-tor/869) --- _[View the full topic](https://support.delta.chat/t/lan-decentralized-no-internet-setup-mdns-smtp-server-postfix-delta-chat-imap-server-dovecot/583)._