# Chatmail Relays **URL:** https://forum.delta.chat/c/relays/23.md [Latest](https://forum.delta.chat/latest.md) · [Categories](https://forum.delta.chat/categories.md) · [Tags](https://forum.delta.chat/tags.md) --- ## [About the Chatmail Relays category](https://forum.delta.chat/t/about-the-chatmail-relays-category/4689)
**Author:** [@r10s](https://forum.delta.chat/u/r10s)\ **Replies:** 0\ **Last updated:** [February 6, 2026, 1:46pm UTC](https://forum.delta.chat/t/about-the-chatmail-relays-category/4689 "2026-02-06T13:46:45Z")
Category for relay operators, offering cheap and dumb servers to store and forward messages. This category is for mutual help as well as for feature proposals, testing and thelike. See https://chatmail.at for more deta… --- ## [Attn chat.deltachatkg.xyz sysop \[is blocking SMTP/IMAP ports\]](https://forum.delta.chat/t/attn-chat-deltachatkg-xyz-sysop-is-blocking-smtp-imap-ports/5894)
**Author:** [@punkero](https://forum.delta.chat/u/punkero)\ **Replies:** 3\ **Last updated:** [October 16, 2026, 4:19pm UTC](https://forum.delta.chat/t/attn-chat-deltachatkg-xyz-sysop-is-blocking-smtp-imap-ports/5894 "2026-10-16T16:19:20Z")
To the sysop of chat.deltachatkg.xyz,\[1\] your relay is blocking the SMTP/IMAP ports. I have a user on my relay attempting to send to someone on your relay and it’s error’ing out in the logs trying to connect. I did a qui… --- ## [Pay for chatmail server](https://forum.delta.chat/t/pay-for-chatmail-server/4658)
**Author:** [@irvan-putra](https://forum.delta.chat/u/irvan-putra)\ **Replies:** 23\ **Last updated:** [October 16, 2026, 4:10pm UTC](https://forum.delta.chat/t/pay-for-chatmail-server/4658 "2026-10-16T16:10:55Z")
Expected behavior I can pay for using a chatmail server or create my own server just like i pay someone to host and manage Wordpress for me Actual behavior I can only this outside DeltaChat app My initial thinking Disc… --- ## [Chinese local relays?](https://forum.delta.chat/t/chinese-local-relays/5877)
**Author:** [@ycEric](https://forum.delta.chat/u/ycEric)\ **Replies:** 1\ **Last updated:** [October 8, 2026, 9:07am UTC](https://forum.delta.chat/t/chinese-local-relays/5877 "2026-10-08T09:07:36Z")
the chatmail relays are banned by gfw. we need stable relays, are there any in china or hk? --- ## [China working chatmail relay](https://forum.delta.chat/t/china-working-chatmail-relay/5598)
**Author:** [@4d8raohp5tnjqr2wdv4](https://forum.delta.chat/u/4d8raohp5tnjqr2wdv4)\ **Replies:** 1\ **Last updated:** [October 7, 2026, 3:15pm UTC](https://forum.delta.chat/t/china-working-chatmail-relay/5598 "2026-10-07T15:15:21Z")
I am in China, and many servers have been blocked by the Great Firewall. I need a server that is still accessible. Thank you. --- ## [Rename “chatmail relay” to “chat relay”](https://forum.delta.chat/t/rename-chatmail-relay-to-chat-relay/5837)
**Author:** [@Raiden](https://forum.delta.chat/u/Raiden)\ **Replies:** 2\ **Last updated:** [October 1, 2026, 1:52pm UTC](https://forum.delta.chat/t/rename-chatmail-relay-to-chat-relay/5837 "2026-10-01T13:52:43Z")
I would like to propose a name change: rename “chatmail relay” to “chat relay”. This may sound like a minor detail, but I think the current name creates a misleading mental model for users. When people hear “mail”, the… --- ## [Add information about the datacenter / hoster to chatmail relay list](https://forum.delta.chat/t/add-information-about-the-datacenter-hoster-to-chatmail-relay-list/5832)
**Author:** [@SWEETGOOD](https://forum.delta.chat/u/SWEETGOOD)\ **Replies:** 4\ **Last updated:** [September 27, 2026, 6:39am UTC](https://forum.delta.chat/t/add-information-about-the-datacenter-hoster-to-chatmail-relay-list/5832 "2026-09-27T06:39:44Z")
Chatmail relays are a really great thing which help to increase resiliency of communication. And they work really really well :heart: But to get real resilience it would make sense to help users to choose relays which a… --- ## [Safe reinstallation of a chatmail relay](https://forum.delta.chat/t/safe-reinstallation-of-a-chatmail-relay/5816)
**Author:** [@alxndr](https://forum.delta.chat/u/alxndr)\ **Replies:** 0\ **Last updated:** [September 23, 2026, 12:26pm UTC](https://forum.delta.chat/t/safe-reinstallation-of-a-chatmail-relay/5816 "2026-09-23T12:26:16Z")
I’m currently running delta.ybti.net on Ubuntu 24.04, but would like to switch to Debian as soon as Debian 13 compatibility is solved. The document Migrating to a new machine explains migrating between two running serve… --- ## [Private relay inquiry](https://forum.delta.chat/t/private-relay-inquiry/5803)
**Author:** [@Zhenghao](https://forum.delta.chat/u/Zhenghao)\ **Replies:** 1\ **Last updated:** [September 22, 2026, 12:14pm UTC](https://forum.delta.chat/t/private-relay-inquiry/5803 "2026-09-22T12:14:18Z")
I believe it has been mentioned that there may be more private relays that ones may be able to use with Delta Chat? May I please ask if it is reasonable to ask for one? Thank you for your kind consideration and recommend… --- ## [\[cmdeploy test\] FAILED test\_hide\_senders\_ip\_address (solved)](https://forum.delta.chat/t/cmdeploy-test-failed-test-hide-senders-ip-address-solved/5793)
**Author:** [@DynOpsArchitect](https://forum.delta.chat/u/DynOpsArchitect)\ **Replies:** 1\ **Last updated:** [September 18, 2026, 11:21am UTC](https://forum.delta.chat/t/cmdeploy-test-failed-test-hide-senders-ip-address-solved/5793 "2026-09-18T11:21:40Z")
Hello all! I am new to this forum as well as to selfhosting a Chatmail Relay. Trying the second one I am running into the following error when using cmdeploy test: \\\[gw3\\\] \\\[ 22%\\\] FAILED cmdeploy/src/cmdeploy/tests/o… --- ## [Chatmail server docker deployment](https://forum.delta.chat/t/chatmail-server-docker-deployment/2927)
**Author:** [@indridieinarsson](https://forum.delta.chat/u/indridieinarsson)\ **Replies:** 13\ **Last updated:** [September 13, 2026, 11:24am UTC](https://forum.delta.chat/t/chatmail-server-docker-deployment/2927 "2026-09-13T11:24:54Z")
Hello, I’m looking to deploy a chatmail server. Since it would fit the rest of the stuff deployed on my private-projects machine, I would like to deploy in form of a container, instead of doing it directly on the machin… --- ## [Delta chat relay along with traefik reverse proxy](https://forum.delta.chat/t/delta-chat-relay-along-with-traefik-reverse-proxy/5771)
**Author:** [@mrdkknonm](https://forum.delta.chat/u/mrdkknonm)\ **Replies:** 2\ **Last updated:** [September 12, 2026, 3:25pm UTC](https://forum.delta.chat/t/delta-chat-relay-along-with-traefik-reverse-proxy/5771 "2026-09-12T15:25:57Z")
Hello everyone, I have couple of wordpress sites behind traefik reverse proxy with auto lets encrypt renewal. Everything is in docker compose yml file. What is the best way to host chat relay on that host? --- ## [A new Canadian-hosted chat relay server for inclusion in your public list](https://forum.delta.chat/t/a-new-canadian-hosted-chat-relay-server-for-inclusion-in-your-public-list/5738)
**Author:** [@esbeeb](https://forum.delta.chat/u/esbeeb)\ **Replies:** 0\ **Last updated:** [September 2, 2026, 1:12pm UTC](https://forum.delta.chat/t/a-new-canadian-hosted-chat-relay-server-for-inclusion-in-your-public-list/5738 "2026-09-02T13:12:57Z")
Hello, After installing deltachat on a cloud server I rent and administer for over a month (to get a sense of its normal operation), I’m now feeling ready to announce it publicly. I run it (I’m a Canadian citizen), and… --- ## [Blocklist for username phishing attempts](https://forum.delta.chat/t/blocklist-for-username-phishing-attempts/5521)
**Author:** [@punkero](https://forum.delta.chat/u/punkero)\ **Replies:** 2\ **Last updated:** [August 15, 2026, 12:04pm UTC](https://forum.delta.chat/t/blocklist-for-username-phishing-attempts/5521 "2026-08-15T12:04:34Z")
Hi all, was inspecting the relay VPS after a provider maintenance (forced reboot) and noticed that someone has been phishing the endpoints for 9 character deterministic logins; the attempt created the directories in /hom… --- ## [Managing deployed "releases" for chatmail server](https://forum.delta.chat/t/managing-deployed-releases-for-chatmail-server/2980)
**Author:** [@wonky-wombat](https://forum.delta.chat/u/wonky-wombat)\ **Replies:** 3\ **Last updated:** [August 13, 2026, 12:12am UTC](https://forum.delta.chat/t/managing-deployed-releases-for-chatmail-server/2980 "2026-08-13T00:12:46Z")
hello! i’m hosting a public chatmail server at https://bcc.chat i’m wondering if there’s a recommended strategy right now for choosing a commit from git branch main to deploy since chatmail isn’t cutting releases with … --- ## [Backup service concept](https://forum.delta.chat/t/backup-service-concept/5542)
**Author:** [@andrew.czmwkpwim](https://forum.delta.chat/u/andrew.czmwkpwim)\ **Replies:** 5\ **Last updated:** [August 12, 2026, 7:28pm UTC](https://forum.delta.chat/t/backup-service-concept/5542 "2026-08-12T19:28:35Z")
Some context: For the past month I have been using Delta Chat extensively while traveling abroad with my family. This is our first experience with Delta Chat and I am very impressed. We are using it across multiple devic… --- ## [Postfix security announcements, upgrade as you can!](https://forum.delta.chat/t/postfix-security-announcements-upgrade-as-you-can/5634)
**Author:** [@esbeeb](https://forum.delta.chat/u/esbeeb)\ **Replies:** 1\ **Last updated:** [August 11, 2026, 10:03pm UTC](https://forum.delta.chat/t/postfix-security-announcements-upgrade-as-you-can/5634 "2026-08-11T22:03:18Z")
“This release addresses medium-impact problems that need to be fixed as some enable remote DOS or policy bypass.” “These defects were found by Qualys assisted by Claude Mythos Preview, and by OpenAI Security; more than … --- ## [Chatmail and Static Website on Same Server](https://forum.delta.chat/t/chatmail-and-static-website-on-same-server/5110)
**Author:** [@untoasted-duvet](https://forum.delta.chat/u/untoasted-duvet)\ **Replies:** 6\ **Last updated:** [August 11, 2026, 7:29pm UTC](https://forum.delta.chat/t/chatmail-and-static-website-on-same-server/5110 "2026-08-11T19:29:39Z")
I set up a chatmail relay on a subdomain, chat.example.com. I skipped uploading a webpage by setting the www\_folder value to disabled. I would like to use the same server to host a static website on the root domain, exa… --- ## [Cert Expired, Acmetool Service Failed \[invalid IPv6 record in DNS\]](https://forum.delta.chat/t/cert-expired-acmetool-service-failed-invalid-ipv6-record-in-dns/5610)
**Author:** [@untoasted-duvet](https://forum.delta.chat/u/untoasted-duvet)\ **Replies:** 4\ **Last updated:** [August 3, 2026, 4:52am UTC](https://forum.delta.chat/t/cert-expired-acmetool-service-failed-invalid-ipv6-record-in-dns/5610 "2026-08-03T04:52:38Z")
Hello, My certificate expired and it seems that the failing service acmetool-reconcile is to blame. The redacted output from journalctl is, error satisfying Target(chat.example.com,mta-sts.chat.example.com,www.chat.exa… --- ## [Chatmail self hosted server stopped working in Russia \[fingerprint prior to v2.56\]](https://forum.delta.chat/t/chatmail-self-hosted-server-stopped-working-in-russia-fingerprint-prior-to-v2-56/5561)
**Author:** [@Freddy](https://forum.delta.chat/u/Freddy)\ **Replies:** 10\ **Last updated:** [August 2, 2026, 5:07pm UTC](https://forum.delta.chat/t/chatmail-self-hosted-server-stopped-working-in-russia-fingerprint-prior-to-v2-56/5561 "2026-08-02T17:07:54Z")
Hello, delta chat application unable to connect to Chatmail server located in Russia. The issie looks similar to My relay stopped working, how to fix? \[timeout on IMAP connection after CAPABILITY\] - #24 by lnchk It see… --- ## [Chatmail should not hardcode a static loadavg check by default](https://forum.delta.chat/t/chatmail-should-not-hardcode-a-static-loadavg-check-by-default/5606)
**Author:** [@ian](https://forum.delta.chat/u/ian)\ **Replies:** 1\ **Last updated:** [August 1, 2026, 9:40am UTC](https://forum.delta.chat/t/chatmail-should-not-hardcode-a-static-loadavg-check-by-default/5606 "2026-08-01T09:40:03Z")
There are multiple problems with disabling registration when load average reached a static magic number such as 5. If the machine has 128 cores, it is perfectly normal to have a load average of 64. The installer shoul… --- ## [My relay has expired certificate and cmdeploy run fails \[invalid IPv6 record in DNS\]](https://forum.delta.chat/t/my-relay-has-expired-certificate-and-cmdeploy-run-fails-invalid-ipv6-record-in-dns/5571)
**Author:** [@steko](https://forum.delta.chat/u/steko)\ **Replies:** 3\ **Last updated:** [July 27, 2026, 3:02pm UTC](https://forum.delta.chat/t/my-relay-has-expired-certificate-and-cmdeploy-run-fails-invalid-ipv6-record-in-dns/5571 "2026-07-27T15:02:49Z")
Hi, I’m having big problems with deploy on sediz.iosa.it atm, the certificate is expired There is a cmdeploy log here Disroot Bin - Encrypted pastebin by PrivateBin all steps related to acme and certificates fail --- ## [How to change config of chat relay](https://forum.delta.chat/t/how-to-change-config-of-chat-relay/5487)
**Author:** [@broncheolus](https://forum.delta.chat/u/broncheolus)\ **Replies:** 3\ **Last updated:** [July 27, 2026, 12:46pm UTC](https://forum.delta.chat/t/how-to-change-config-of-chat-relay/5487 "2026-07-27T12:46:57Z")
Hi there, I have a chat relay running on a raspberry pi and it’s working really fine. Now after some time I want to change certain parameters like max message size. I found some posts about this topic but I don’t really… --- ## [Ensure only problem-free chatmail servers are suggested on the public list by monitoring](https://forum.delta.chat/t/ensure-only-problem-free-chatmail-servers-are-suggested-on-the-public-list-by-monitoring/5557)
**Author:** [@ian](https://forum.delta.chat/u/ian)\ **Replies:** 0\ **Last updated:** [July 19, 2026, 4:10pm UTC](https://forum.delta.chat/t/ensure-only-problem-free-chatmail-servers-are-suggested-on-the-public-list-by-monitoring/5557 "2026-07-19T16:10:13Z")
The service level availability of some of the entries may degrade over time, they may not see regular updates or they may be plagued by unfixed configuration issues that compromise their ability to fully participate in t… --- ## [My relay stopped working, how to fix? \[timeout on IMAP connection after CAPABILITY\]](https://forum.delta.chat/t/my-relay-stopped-working-how-to-fix-timeout-on-imap-connection-after-capability/5369)
**Author:** [@f7n5xmavu](https://forum.delta.chat/u/f7n5xmavu)\ **Replies:** 26\ **Last updated:** [July 24, 2026, 10:25am UTC](https://forum.delta.chat/t/my-relay-stopped-working-how-to-fix-timeout-on-imap-connection-after-capability/5369 "2026-07-24T10:25:36Z")
Hosted a relay to avoid censorship in Russia and keep in touch with family. Configured domain, deployed chatmail relay on VPS in Russia, never touched. Today (5 Jun 2026) it stopped working (either when connect from wi… --- ## [在中国邮件中继屏蔽了，如何解决？](https://forum.delta.chat/t/topic/5544)
**Author:** [@sam-zheng](https://forum.delta.chat/u/sam-zheng)\ **Replies:** 1\ **Last updated:** [July 22, 2026, 1:11pm UTC](https://forum.delta.chat/t/topic/5544 "2026-07-22T13:11:51Z")
中继屏蔽了，能不能把中继服务器部署到cloudflare，有教程吗？谢谢 --- ## ["cmdeploy test" fails after update \[test\_0\_login.py::test\_no\_vrfy smtplib.SMTP OSError: Network is unreachable\]](https://forum.delta.chat/t/cmdeploy-test-fails-after-update-test-0-login-py-test-no-vrfy-smtplib-smtp-oserror-network-is-unreachable/5548)
**Author:** [@hoiba](https://forum.delta.chat/u/hoiba)\ **Replies:** 9\ **Last updated:** [July 20, 2026, 1:44pm UTC](https://forum.delta.chat/t/cmdeploy-test-fails-after-update-test-0-login-py-test-no-vrfy-smtplib-smtp-oserror-network-is-unreachable/5548 "2026-07-20T13:44:52Z")
Hello there! I’ve just updated my Chatmail Relay which went fine. No issues there. But after the update, when I run “cmdeploy test”, it stops at this error: \[gw1\] \[ 97%\] FAILED cmdeploy/src/cmdeploy/tests/online/test\_… --- ## [Connection does not get established \[federation to servers with expired certificate\]](https://forum.delta.chat/t/connection-does-not-get-established-federation-to-servers-with-expired-certificate/5552)
**Author:** [@Iago](https://forum.delta.chat/u/Iago)\ **Replies:** 1\ **Last updated:** [July 18, 2026, 4:40pm UTC](https://forum.delta.chat/t/connection-does-not-get-established-federation-to-servers-with-expired-certificate/5552 "2026-07-18T16:40:48Z")
I was trying to connect a profile in the default chatmail relay (nine.testrun.org) with a profile in the chatmail relay danneskjold.de, but they do not connect. I get Even no space to write, nothing. Indefinite. The … --- ## [SMTP Error on new chatmail relay](https://forum.delta.chat/t/smtp-error-on-new-chatmail-relay/5522)
**Author:** [@hs235711](https://forum.delta.chat/u/hs235711)\ **Replies:** 1\ **Last updated:** [July 13, 2026, 7:34am UTC](https://forum.delta.chat/t/smtp-error-on-new-chatmail-relay/5522 "2026-07-13T07:34:08Z")
I installed a new chatmail relay server, and installation finished without any problem. But when I want to create a new account on it I get this error: SMTP failed to connect: All connection attempts failed: Connection… --- ## [Deliver messages via HTTPS (filtermail-transport)](https://forum.delta.chat/t/deliver-messages-via-https-filtermail-transport/5282)
**Author:** [@bestman](https://forum.delta.chat/u/bestman)\ **Replies:** 3\ **Last updated:** [July 12, 2026, 11:51am UTC](https://forum.delta.chat/t/deliver-messages-via-https-filtermail-transport/5282 "2026-07-12T11:51:15Z")
I’m looking at the latest update, but I’m still unclear on the “Introduce filtermail-transport for delivering messages via HTTPS (SMTP stays as fallback)” scheme. So, does this mean we’re using Nginx on port 443? I’m als… [Next page](https://forum.delta.chat/c/relays/23.md?page=1)