Unable to connect to a local Proton MailBridge, SSL or STARTTLS not available in Open Archiver? #211

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MrUnknownDE · 2026-04-05T16:17:05+02:00

MrUnknownDE commented

2026-04-05 16:17:05 +02:00

Originally created by @PIAServices on 9/22/2025

System:

Debian 13.1.0 @Proxmox 9.0.6
Open Archiver Version: 0.3.3
Valkey :latest
Meilisearch :latest

Proton MailBridge connects to Proton Mailserver with a given Account and decrypts the Mails to its local Database.
Local Clients (as Thunderbird or Open Archiver) can connect via IMAP with specified Parameters, given by Proton MailBridge:

IMAP
Port: 1143
Server: 127.0.0.1
Account
Password
Security: SSL

In the MailBridge-Settings, the IMAP-Port can be changed, but not to 993, it is marked as 'used'.
Security can also be changed, but only to SSL & STARTTLS -- TLS is not available.

In Open Archiver only TLS is available.
The connection fails permanently with the following error:

Authentication failed
connect ECONNREFUSED 127.0.1.1:1143

The error suggests, that there is no answer on Port 1143, but an also local installed Thunderbird works fine and connects to the local Proton MailBridge with IMAP on Port 1143 using SSL/TLS or even STARTTLS.
It pulls Mail from the Proton MailBridge without any issue.

On the other hand, an Ingestion Source via IMAP on Port 993 using SSL/TLS on a remote Mailserver via Internet, is working fine in Open Archiver.

*Originally created by @PIAServices on 9/22/2025* System: ====== Debian 13.1.0 @Proxmox 9.0.6 Open Archiver Version: 0.3.3 Valkey :latest Meilisearch :latest [Proton MailBridge](url) connects to Proton Mailserver with a given Account and decrypts the Mails to its local Database. Local Clients (as Thunderbird or Open Archiver) can connect via IMAP with specified Parameters, given by Proton MailBridge: IMAP Port: 1143 Server: 127.0.0.1 _Account_ _Password_ Security: **SSL** In the MailBridge-Settings, the IMAP-Port can be changed, but not to 993, it is marked as 'used'. Security can also be changed, but only to **SSL** & **STARTTLS** -- TLS is **not** available. In Open Archiver only **TLS** is available. The connection fails permanently with the following error: _**Authentication failed connect ECONNREFUSED 127.0.1.1:1143**_ The error suggests, that there is no answer on Port 1143, but an also local installed Thunderbird works fine and connects to the local Proton MailBridge with IMAP on Port 1143 using SSL/TLS or even STARTTLS. It pulls Mail from the Proton MailBridge without any issue. On the other hand, an Ingestion Source via IMAP on Port 993 using SSL/TLS on a remote Mailserver via Internet, is working fine in Open Archiver.

MrUnknownDE closed this issue

2026-04-05 16:17:05 +02:00

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Reference: github/OpenArchiver#211