# Chatmail Relays **URL:** https://forum.delta.chat/c/relays/23.md?page=1 [Latest](https://forum.delta.chat/latest.md) · [Categories](https://forum.delta.chat/categories.md) · [Tags](https://forum.delta.chat/tags.md) **Page:** 2 --- ## [Yunohost support for Chatmail server](https://forum.delta.chat/t/yunohost-support-for-chatmail-server/3223)
**Author:** [@hermann](https://forum.delta.chat/u/hermann)\ **Replies:** 6\ **Last updated:** [June 30, 2026, 7:26pm UTC](https://forum.delta.chat/t/yunohost-support-for-chatmail-server/3223 "2026-06-30T19:26:23Z")
This just to let those people know who would like to see a Shatmail server on Yunohost. I’ve tried to add it to the app wishlist but it was declined automatically. Reason: YunoHost already integrates a mail server I… --- ## [How mandatory is that CAA record for chatmail relays?](https://forum.delta.chat/t/how-mandatory-is-that-caa-record-for-chatmail-relays/5460)
**Author:** [@esbeeb](https://forum.delta.chat/u/esbeeb)\ **Replies:** 3\ **Last updated:** [June 22, 2026, 9:20pm UTC](https://forum.delta.chat/t/how-mandatory-is-that-caa-record-for-chatmail-relays/5460 "2026-06-22T21:20:51Z")
I’ve set up my first chatmail server on an available domain I own. For the sake of example, let’s pretend it’s example.com It’s a VPS running Debian 12. I created all the DNS records it asked. It creates a CAA record lo… --- ## [Best practice to update chatmail relay \[also: releases vs. main branch\]](https://forum.delta.chat/t/best-practice-to-update-chatmail-relay-also-releases-vs-main-branch/4982)
**Author:** [@SWEETGOOD](https://forum.delta.chat/u/SWEETGOOD)\ **Replies:** 7\ **Last updated:** [June 18, 2026, 6:16am UTC](https://forum.delta.chat/t/best-practice-to-update-chatmail-relay-also-releases-vs-main-branch/4982 "2026-06-18T06:16:08Z")
I wonder why there’s no admin instruction on how to upgrade a chatmail relay safely. I found this post but from a DevOps perspective this is far from ideal. Let me explain why: The last official release (1.9.0) is from … --- ## [Chatmail relay support on Stalwart](https://forum.delta.chat/t/chatmail-relay-support-on-stalwart/5441)
**Author:** [@how](https://forum.delta.chat/u/how)\ **Replies:** 0\ **Last updated:** [June 15, 2026, 8:32am UTC](https://forum.delta.chat/t/chatmail-relay-support-on-stalwart/5441 "2026-06-15T08:32:06Z")
FYI, I have started a feature request on Stalwart support forum to implement chatmail relay support with the hope Stalwart will eventually provide full support for Delta.chat. --- ## [Let's Encrypt bans certificate usage in any US sanctioned territory](https://forum.delta.chat/t/lets-encrypt-bans-certificate-usage-in-any-us-sanctioned-territory/5415)
**Author:** [@ian](https://forum.delta.chat/u/ian)\ **Replies:** 2\ **Last updated:** [June 12, 2026, 4:13pm UTC](https://forum.delta.chat/t/lets-encrypt-bans-certificate-usage-in-any-us-sanctioned-territory/5415 "2026-06-12T16:13:42Z")
--- ## [Error updating Chatmail relay \[Upload /etc/resolv.conf: no such file\]](https://forum.delta.chat/t/error-updating-chatmail-relay-upload-etc-resolv-conf-no-such-file/5425)
**Author:** [@Flimmster](https://forum.delta.chat/u/Flimmster)\ **Replies:** 7\ **Last updated:** [June 12, 2026, 2:43pm UTC](https://forum.delta.chat/t/error-updating-chatmail-relay-upload-etc-resolv-conf-no-such-file/5425 "2026-06-12T14:43:07Z")
Hello, im running into an issue updating my relay. I followed the steps described here in the docs (couldnt link for some reason) but im getting this error: Has anyone else ran into this issue that can help? Thanks… --- ## [Blocking the connection on your server via protocol or https](https://forum.delta.chat/t/blocking-the-connection-on-your-server-via-protocol-or-https/5397)
**Author:** [@bestman](https://forum.delta.chat/u/bestman)\ **Replies:** 9\ **Last updated:** [June 10, 2026, 12:33pm UTC](https://forum.delta.chat/t/blocking-the-connection-on-your-server-via-protocol-or-https/5397 "2026-06-10T12:33:41Z")
Over the past few days, deltachat chatmail has been blocked in the Russian Federation, and a VPN is running on the same server and it works perfectly. Through a vpn, the application connects to the server, without a vpn … --- ## [Error installing cmdeploy run \[:80 bind: address already in use - acmetool\]](https://forum.delta.chat/t/error-installing-cmdeploy-run-80-bind-address-already-in-use-acmetool/4386)
**Author:** [@lex2117](https://forum.delta.chat/u/lex2117)\ **Replies:** 7\ **Last updated:** [June 9, 2026, 5:13pm UTC](https://forum.delta.chat/t/error-installing-cmdeploy-run-80-bind-address-already-in-use-acmetool/4386 "2026-06-09T17:13:18Z")
Good afternoon. When I run cmdeploy run, the process runs fine until the certificate request. It fails with an error (failed to listen on :80: listen tcp :80: bind: address already in use). The port is busy. Has anyone … --- ## [How do I install Delta Chat on a VPS? 📡 \[chatmail relay with a single click\]](https://forum.delta.chat/t/how-do-i-install-delta-chat-on-a-vps-chatmail-relay-with-a-single-click/5388)
**Author:** [@jerry](https://forum.delta.chat/u/jerry)\ **Replies:** 8\ **Last updated:** [June 9, 2026, 3:05pm UTC](https://forum.delta.chat/t/how-do-i-install-delta-chat-on-a-vps-chatmail-relay-with-a-single-click/5388 "2026-06-09T15:05:46Z")
Hello everyone :waving\_hand: Could you please tell me how to install Delta Chat on a VPS? I have a few questions and would be grateful for your help.:raising\_hands::folded\_hands: Is there a one-click installation scr… --- ## [Security concern: Does relay store the IP or details of the sender?](https://forum.delta.chat/t/security-concern-does-relay-store-the-ip-or-details-of-the-sender/5198)
**Author:** [@Ovaday](https://forum.delta.chat/u/Ovaday)\ **Replies:** 15\ **Last updated:** [June 6, 2026, 4:28pm UTC](https://forum.delta.chat/t/security-concern-does-relay-store-the-ip-or-details-of-the-sender/5198 "2026-06-06T16:28:21Z")
Hi everyone, I have a question about the privacy of the Sender. Let’s take an imaginary situation: There exists a totalitarian regime-driven country that opreses all channels of communication. Somehow, it finds your D… --- ## [Port 25 has many restrictions, why not using another for a "Chatmail network"?](https://forum.delta.chat/t/port-25-has-many-restrictions-why-not-using-another-for-a-chatmail-network/4363)
**Author:** [@ebert](https://forum.delta.chat/u/ebert)\ **Replies:** 7\ **Last updated:** [June 5, 2026, 4:03pm UTC](https://forum.delta.chat/t/port-25-has-many-restrictions-why-not-using-another-for-a-chatmail-network/4363 "2026-06-05T16:03:02Z")
Port 25 is used for email servers. This is because the server instance on a machine can prove to be run by an administrator. Additionally most providers don’t allow you to use port 25. Both techniques are used in order t… --- ## [Paid Servers: The economics of running a chatmail server](https://forum.delta.chat/t/paid-servers-the-economics-of-running-a-chatmail-server/5047)
**Author:** [@Low](https://forum.delta.chat/u/Low)\ **Replies:** 12\ **Last updated:** [May 31, 2026, 9:16am UTC](https://forum.delta.chat/t/paid-servers-the-economics-of-running-a-chatmail-server/5047 "2026-05-31T09:16:47Z")
Just want to think through this with you all. Based on the metric on the chatmail website, you can run a server for 100k people for roughly $40 per month. If you charged each user $1 per year like the original Whatsapp… --- ## [Chatmail servers on delta.chat](https://forum.delta.chat/t/chatmail-servers-on-delta-chat/4288)
**Author:** [@23jkwklmr](https://forum.delta.chat/u/23jkwklmr)\ **Replies:** 9\ **Last updated:** [May 30, 2026, 1:26pm UTC](https://forum.delta.chat/t/chatmail-servers-on-delta-chat/4288 "2026-05-30T13:26:47Z")
What is your recipe to maintain contact with people using random servers you promote on your site? What is a justification to use a random server which cannot last for the next 6 or 12 months? The point of using Messag… --- ## [Maintenance: reboot your relay(s) for new LTS kernels](https://forum.delta.chat/t/maintenance-reboot-your-relay-s-for-new-lts-kernels/5331)
**Author:** [@punkero](https://forum.delta.chat/u/punkero)\ **Replies:** 2\ **Last updated:** [May 29, 2026, 2:40pm UTC](https://forum.delta.chat/t/maintenance-reboot-your-relay-s-for-new-lts-kernels/5331 "2026-05-29T14:40:51Z")
Hi all, my intended audience here is all the awesome people who are adding relays but (based on me reading comments) maybe not Linux professionals or live and breathe this stuff. (I’m a retired Linux systems nerd fwiw) W… --- ## [Can a chatmail relay server handle multiple domains?](https://forum.delta.chat/t/can-a-chatmail-relay-server-handle-multiple-domains/5263)
**Author:** [@deltachatuser](https://forum.delta.chat/u/deltachatuser)\ **Replies:** 0\ **Last updated:** [May 14, 2026, 10:15pm UTC](https://forum.delta.chat/t/can-a-chatmail-relay-server-handle-multiple-domains/5263 "2026-05-14T22:15:08Z")
I tried to find a discussion here in the forum, and also in the chatmail relay documentation without success. The story I am seeing is that there is already a community using a server, somehow the domain is an identity … --- ## [Relay - Constantly flickering network light](https://forum.delta.chat/t/relay-constantly-flickering-network-light/5247)
**Author:** [@broncheolus](https://forum.delta.chat/u/broncheolus)\ **Replies:** 21\ **Last updated:** [May 14, 2026, 12:50pm UTC](https://forum.delta.chat/t/relay-constantly-flickering-network-light/5247 "2026-05-14T12:50:42Z")
Dear Community, on my relay the network light is constantly flickering. So does the light of my fiberglas connection. In my fritzbox no relevant data is seen to be used. Is this normal or should I be concerned about thi… --- ## [Cmrelaymon - Monitor a Chatmail relay's port availability](https://forum.delta.chat/t/cmrelaymon-monitor-a-chatmail-relays-port-availability/5244)
**Author:** [@punkero](https://forum.delta.chat/u/punkero)\ **Replies:** 0\ **Last updated:** [May 11, 2026, 5:12pm UTC](https://forum.delta.chat/t/cmrelaymon-monitor-a-chatmail-relays-port-availability/5244 "2026-05-11T17:12:35Z")
I am a proponent of the healthchecks.io style of monitoring - tasks ping home only when they succeed, lack of pings indicates a failure, proceed to issue alerts. I whipped up a small script to remotely monitor the chatma… --- ## [New chatmail relay in the UK](https://forum.delta.chat/t/new-chatmail-relay-in-the-uk/5108)
**Author:** [@thisisyourtech](https://forum.delta.chat/u/thisisyourtech)\ **Replies:** 1\ **Last updated:** [May 11, 2026, 6:30am UTC](https://forum.delta.chat/t/new-chatmail-relay-in-the-uk/5108 "2026-05-11T06:30:00Z")
Hello - I’m new to the forum and haven’t contributed anything, but I’d like to announce a UK based chatmail server at https://chat.thisisyour.tech. It’s provided by my business, This is Your Tech which is all about open… --- ## [Problem installing chat relay \[certificate for shared IPv4 address space\]](https://forum.delta.chat/t/problem-installing-chat-relay-certificate-for-shared-ipv4-address-space/5180)
**Author:** [@broncheolus](https://forum.delta.chat/u/broncheolus)\ **Replies:** 30\ **Last updated:** [May 10, 2026, 10:11pm UTC](https://forum.delta.chat/t/problem-installing-chat-relay-certificate-for-shared-ipv4-address-space/5180 "2026-05-10T22:11:00Z")
Hi there long time no see. I’m trying to install a chatmail relay. I have my own domain at strato and I’ve tried to setup DNS correctly (not sure if I’ve actually managed it) I try to follow this description: How to d… --- ## [Non-random addresses - community + customers + marketing + suppliers + webmaster](https://forum.delta.chat/t/non-random-addresses-community-customers-marketing-suppliers-webmaster/5196)
**Author:** [@mwaters](https://forum.delta.chat/u/mwaters)\ **Replies:** 2\ **Last updated:** [May 7, 2026, 6:07pm UTC](https://forum.delta.chat/t/non-random-addresses-community-customers-marketing-suppliers-webmaster/5196 "2026-05-07T18:07:47Z")
Hello everyone. I have a chatmail server running at https://vinculum0.net/ I just looked at the mail directory - /home/vmail/mail/vinculum0.net/ , and there are five non-random addresses - community + customers + marke… --- ## [Where can I see an amount of users on my Chatmail relay](https://forum.delta.chat/t/where-can-i-see-an-amount-of-users-on-my-chatmail-relay/4457)
**Author:** [@timursagdenov](https://forum.delta.chat/u/timursagdenov)\ **Replies:** 3\ **Last updated:** [May 7, 2026, 4:14pm UTC](https://forum.delta.chat/t/where-can-i-see-an-amount-of-users-on-my-chatmail-relay/4457 "2026-05-07T16:14:54Z")
I have a chatmail relay (https://deltachat.kz). I want to know how many users are registered on my chatmail relay. Following ChatGPT instructions, I tried sudo journalctl -u dovecot --no-pager -n 50, but it shows only l… --- ## [Failing tests on new relay install \[reject\_forged\_from, login\_basic\_functioning\[imap\], newemail\_configure\]](https://forum.delta.chat/t/failing-tests-on-new-relay-install-reject-forged-from-login-basic-functioning-imap-newemail-configure/4987)
**Author:** [@diagram](https://forum.delta.chat/u/diagram)\ **Replies:** 6\ **Last updated:** [May 6, 2026, 4:35pm UTC](https://forum.delta.chat/t/failing-tests-on-new-relay-install-reject-forged-from-login-basic-functioning-imap-newemail-configure/4987 "2026-05-06T16:35:04Z")
Hello, I completed the install instructions for a relay on Debian 12 at https://chat.luddite.tools . I had a couple of hickups fixing #666 and #647 but otherwise all OK. DNS test is OK except for the CAA that doesn’t see… --- ## [Message-sending delays to federated relays because deferred mail queue is full](https://forum.delta.chat/t/message-sending-delays-to-federated-relays-because-deferred-mail-queue-is-full/5172)
**Author:** [@maren-bunk](https://forum.delta.chat/u/maren-bunk)\ **Replies:** 5\ **Last updated:** [May 5, 2026, 1:46pm UTC](https://forum.delta.chat/t/message-sending-delays-to-federated-relays-because-deferred-mail-queue-is-full/5172 "2026-05-05T13:46:32Z")
hello! i’m one of the adminstrators of the https://sweetfern.net relay. we’re having an issue where messages to other relays take multiple hours to deliver. this issue was discovered this morning, and i think that it’s … --- ## [I can't pass the test after setting up my chatmail relay \[port 25 blocked\]](https://forum.delta.chat/t/i-cant-pass-the-test-after-setting-up-my-chatmail-relay-port-25-blocked/5157)
**Author:** [@BKLR\_sk](https://forum.delta.chat/u/BKLR_sk)\ **Replies:** 6\ **Last updated:** [May 4, 2026, 9:44am UTC](https://forum.delta.chat/t/i-cant-pass-the-test-after-setting-up-my-chatmail-relay-port-25-blocked/5157 "2026-05-04T09:44:09Z")
Mutual Help \[chatmail relay\]I can’t pass the test after setting up my chatmail relay Flowing the guide, I’ve set up my chatmail relay and then ran commands scripts/cmdeploy dns, scripts/cmdeploy test. But two commands a… --- ## [Do I need to configure something to make push notifications work with self hosted relay?](https://forum.delta.chat/t/do-i-need-to-configure-something-to-make-push-notifications-work-with-self-hosted-relay/5032)
**Author:** [@MurlocKnight](https://forum.delta.chat/u/MurlocKnight)\ **Replies:** 6\ **Last updated:** [May 3, 2026, 12:32am UTC](https://forum.delta.chat/t/do-i-need-to-configure-something-to-make-push-notifications-work-with-self-hosted-relay/5032 "2026-05-03T00:32:49Z")
I set up my relay using these instructions Setting up a chatmail relay - chatmail relay documentation . But I ran into the problem that I don’t receive notifications on android if the app is not open. As I understand it,… --- ## [Idle tcp connections lifetime \[set so\_keepalive=250s in nginx config\]](https://forum.delta.chat/t/idle-tcp-connections-lifetime-set-so-keepalive-250s-in-nginx-config/5087)
**Author:** [@Janus](https://forum.delta.chat/u/Janus)\ **Replies:** 4\ **Last updated:** [May 2, 2026, 3:47pm UTC](https://forum.delta.chat/t/idle-tcp-connections-lifetime-set-so-keepalive-250s-in-nginx-config/5087 "2026-05-02T15:47:19Z")
While operating my private IMAP server, I’ve noticed some cellular operators aggressively delete IPv4 NAT translations after a brief period of inactivity, sometimes after less than five minutes. Combined with android doz… --- ## [Can I use a shared host for a personal Chatmail relay? Or a VPS?](https://forum.delta.chat/t/can-i-use-a-shared-host-for-a-personal-chatmail-relay-or-a-vps/5124)
**Author:** [@u5w0e2l56](https://forum.delta.chat/u/u5w0e2l56)\ **Replies:** 1\ **Last updated:** [April 29, 2026, 8:15am UTC](https://forum.delta.chat/t/can-i-use-a-shared-host-for-a-personal-chatmail-relay-or-a-vps/5124 "2026-04-29T08:15:45Z")
Hello, I’m completely new to Chatmail and I’m considering hosting my own relay. Checked the documentation for setting it up, but wanted to double-check with the community: It says root user access to the deployment ser… --- ## [Is delta.chat going to conflict with existent MS Exchange on a same domain?](https://forum.delta.chat/t/is-delta-chat-going-to-conflict-with-existent-ms-exchange-on-a-same-domain/5073)
**Author:** [@pidrilaebanaja](https://forum.delta.chat/u/pidrilaebanaja)\ **Replies:** 1\ **Last updated:** [April 26, 2026, 6:52am UTC](https://forum.delta.chat/t/is-delta-chat-going-to-conflict-with-existent-ms-exchange-on-a-same-domain/5073 "2026-04-26T06:52:58Z")
Hello everyone! I came here perhaps with a classic XY problem. We have an on-premise Exchange server with SPF and other NS records. My question is: if I set up a Chatmail relay on the same domain (not the same server) as… --- ## [Selling Chatmail to businesses](https://forum.delta.chat/t/selling-chatmail-to-businesses/5081)
**Author:** [@Low](https://forum.delta.chat/u/Low)\ **Replies:** 5\ **Last updated:** [April 26, 2026, 6:43am UTC](https://forum.delta.chat/t/selling-chatmail-to-businesses/5081 "2026-04-26T06:43:23Z")
Has anyone tried selling chatmail setup and management to a business? They pay a LOT for Google email accounts for people. Also for Slack. Sometimes both lol. Since chatmail is dirt cheap, seems like a no brainer. Coul… --- ## [Should nine.testrun.org implement DANE?](https://forum.delta.chat/t/should-nine-testrun-org-implement-dane/5028)
**Author:** [@adamzea](https://forum.delta.chat/u/adamzea)\ **Replies:** 1\ **Last updated:** [April 26, 2026, 12:03am UTC](https://forum.delta.chat/t/should-nine-testrun-org-implement-dane/5028 "2026-04-26T00:03:40Z")
I’ve been trying to update my SMTP servers to get better scores on Internet.nl. I’ve got the Microsoft 365 servers up to 100% now that they support DANE and DNSSEC. Still working on figuring out the Dovecot/Postfix serv… [Previous page](https://forum.delta.chat/c/relays/23.md) [Next page](https://forum.delta.chat/c/relays/23.md?page=2)