Owner

mailcow

2 indexed repositories · View on GitHub

mailcow-dockerized
mailcow: dockerized - 🐮 + 🐋 = 💕

JavaScript · 13446 stars
mailcow-dockerized-docs
mailcow: dockerized - documentation 📰

HTML · 112 stars

Beginner friendly Everything

Open All

regression(2026-07b): DAV/EAS logins missing from SASL log Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 58/100

mailcow/mailcow-dockerized#7470 · Opened Sep 18, 2026
POSTMASTER_HANDLER prefilter unconditionally bypasses spam scoring for postmaster@ mail — no safe way to customize via local.d Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

mailcow/mailcow-dockerized#7469 · 5 comments · Opened Sep 18, 2026
Feature Request: Prometheus Metrics for Authenticated SMTP Activity per Mailbox Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

mailcow/mailcow-dockerized#7465 · Opened Sep 14, 2026
Exclude Mailcow-managed domains from newly registered domain URI checks Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 52/100

mailcow/mailcow-dockerized#7464 · Opened Sep 13, 2026
405 Method Not Allowed on "Download all attachments" in Bulgarian Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

mailcow/mailcow-dockerized#7462 · Opened Sep 11, 2026
netfilter-mailcow infinite restart loop / endlose Neustart-Schleife Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 52/100

mailcow/mailcow-dockerized#7461 · Opened Sep 10, 2026
ActiveSync: credential-less EAS request returns 403 instead of a 401 challenge, silently breaking push Open

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

mailcow/mailcow-dockerized#7458 · Opened Sep 8, 2026
pcre greed Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 82/100

mailcow/mailcow-dockerized#7454 · 1 reaction · Opened Sep 5, 2026
Odd case handling of tags Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

mailcow/mailcow-dockerized#7453 · Opened Sep 4, 2026
SoGo high memory consumption after 2027-07b Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

mailcow/mailcow-dockerized#7452 · Opened Sep 4, 2026
Include aliases in SOGo general adressebook Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

mailcow/mailcow-dockerized#7451 · 2 reactions · Opened Sep 3, 2026
unnecessary cache refreshs by postfix-tlspol-mailcow Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

mailcow/mailcow-dockerized#7449 · Opened Aug 31, 2026
Proton Style Encryption Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

mailcow/mailcow-dockerized#7448 · 1 comment · Opened Aug 31, 2026
update.sh ASN check always prints "Check failed! Maybe a DNS or Network problem?" when ASN service returns 404 for hosts whose prefix it doesn't know Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 68/100

mailcow/mailcow-dockerized#7447 · Opened Aug 30, 2026
Per-domain default rate limit that applies individually per mailbox Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

mailcow/mailcow-dockerized#7445 · Opened Aug 29, 2026
Feature request: Identity Provider auto-redirect + Single Logout (RP-Initiated Logout) Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

mailcow/mailcow-dockerized#7442 · Opened Aug 28, 2026
SOGo 5.12.10: CalDAV/CardDAV requests return 401 in synchronized bursts across multiple mailboxes after update Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 42/100

mailcow/mailcow-dockerized#7441 · 1 comment · Opened Aug 28, 2026
Hide Unauthorized and Disabled Options in Mailcow Settings Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 55/100

mailcow/mailcow-dockerized#7440 · Opened Aug 27, 2026
Mailcow should NOT automatically activate IPv6 on Updates Open

enhancement

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

mailcow/mailcow-dockerized#7436 · 1 comment · Opened Aug 25, 2026
mailcow-reset-admin.sh reports success even when all DB writes silently fail (docker exec -it in non-interactive shells) Open

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

mailcow/mailcow-dockerized#7435 · Opened Aug 24, 2026
WebAuthn/FIDO2 credentials overwrite each other in OS/browser passkey managers Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 30/100

mailcow/mailcow-dockerized#7433 · Opened Aug 22, 2026
Feature Request: Support GBK / GB2312 character encoding in SOGo webmail Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

mailcow/mailcow-dockerized#7421 · 1 comment · Opened Aug 17, 2026
Quarantine stopped working after upgrade to 2026-07a Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 38/100

mailcow/mailcow-dockerized#7420 · 1 comment · 1 reaction · Opened Aug 16, 2026
Mailcows new update check does not respect webproxy configuration Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 55/100

mailcow/mailcow-dockerized#7419 · Opened Aug 16, 2026
Delete mailbox via API - Access Denied Open

not reproduceable

Difficulty 3/5 1-2 days Newbie friendliness 52/100

mailcow/mailcow-dockerized#7411 · 3 comments · Opened Aug 11, 2026
backup_and_restore.sh: `backup all` omits data/conf, with no warning on backup or restore Open

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

mailcow/mailcow-dockerized#7409 · 1 reaction · Opened Aug 11, 2026
Audit Log for Administrative Mailbox Access Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

mailcow/mailcow-dockerized#7408 · 3 reactions · Opened Aug 10, 2026
[Postfix] a transient DNS failure at startup silently disables the Spamhaus blocklists for the life of the container Open

Difficulty 3/5 1-2 days Newbie friendliness 58/100

mailcow/mailcow-dockerized#7406 · Opened Aug 5, 2026
Domain-wide footer silently drops attachments from messages with many nested message/rfc822 parts (18 -> 5) Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 52/100

mailcow/mailcow-dockerized#7399 · 8 comments · Opened Aug 4, 2026
Domain-wide footer silently skipped for multipart mail after Rspamd 4.x upgrade (+ CTE mismatch corrupts embedded images) Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

mailcow/mailcow-dockerized#7398 · 1 comment · Opened Aug 4, 2026
Alias marked as "Visible in SOGo" does not appear in SOGo recipient autocomplete (To/Cc/Bcc) Open

bug upstream

Difficulty 4/5 3-5 days Newbie friendliness 48/100

mailcow/mailcow-dockerized#7397 · 9 comments · Opened Aug 4, 2026
IDN domains: login to mailcow requires use of punycode representation of email address Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 45/100

mailcow/mailcow-dockerized#7395 · Opened Aug 2, 2026
Link in documentaion not valid Open

Difficulty 1/5 Under an hour Newbie friendliness 88/100

mailcow/mailcow-dockerized-docs#968 · 1 comment · Opened Aug 2, 2026
Proposal to modernize the SOGo user interface and contribute a new design Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

mailcow/mailcow-dockerized#7382 · 2 comments · Opened Jul 29, 2026
Adding a tag to a domain that already has tags silently discards it (API returns 200 with empty body) Open

Difficulty 2/5 1-3 hours Newbie friendliness 74/100

mailcow/mailcow-dockerized#7379 · Opened Jul 28, 2026
Mailbox and domain deletion consistently take ~12.3 seconds on 2026-07 Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

mailcow/mailcow-dockerized#7374 · 2 comments · Opened Jul 27, 2026
Mailcow UI "Sync Jobs" Error Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

mailcow/mailcow-dockerized#7373 · Opened Jul 27, 2026
SOGo Logout button only destroys Mailcow session (MCSESSID), leaving SOGo session (0xHIGHFLYxSOGo) active — user lands on SOGo login form instead of Mailcow Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

mailcow/mailcow-dockerized#7369 · 1 reaction · Opened Jul 25, 2026
SOGo web customization (custom-sogo.js, logos, theme.js) silently ignored — per-file bind mounts shadowed by sogo-web-vol-1 Open

Difficulty 4/5 3-5 days Newbie friendliness 58/100

mailcow/mailcow-dockerized#7368 · Opened Jul 25, 2026
`X25519MLKEM768` (PQC hybrid key exchange) fails TLS handshake despite matching OpenSSL version — works fine on vanilla `nginx:1.30.3-alpine` Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

mailcow/mailcow-dockerized#7366 · Opened Jul 24, 2026
MailCow using let's encrypt certificate does not build the certificate containing the proper certificate chain Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

mailcow/mailcow-dockerized#7364 · 2 reactions · Opened Jul 23, 2026
data/assets/ssl-example/{cert,key,dhparams}.pem remain tracked by git despite .gitignore, causing permanent local diffs Open

Difficulty 3/5 1-2 days Newbie friendliness 72/100

mailcow/mailcow-dockerized#7363 · 2 comments · Opened Jul 22, 2026
Make the different login portals MUCH more obvious Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 52/100

mailcow/mailcow-dockerized#7327 · 4 comments · 8 reactions · Opened Jul 13, 2026
Inconsistent maximum message size Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

mailcow/mailcow-dockerized#7318 · 2 comments · 1 reaction · Opened Jul 7, 2026
Support JMAP using JSON APIs over HTTP Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 28/100

mailcow/mailcow-dockerized#7314 · 1 comment · 7 reactions · Opened Jul 2, 2026
UI Arabic + Thai Internationalisation Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

mailcow/mailcow-dockerized#7313 · 3 comments · Opened Jul 2, 2026
spamaddress generation for all domains a mailbox has a alias to Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 45/100

mailcow/mailcow-dockerized#7304 · Opened Jun 22, 2026
Support multiple DNS provider credentials for ACME DNS-01 challenges Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 45/100

mailcow/mailcow-dockerized#7298 · 2 reactions · Opened Jun 18, 2026
Customise username generation for spam email aliases Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 45/100

mailcow/mailcow-dockerized#7297 · Opened Jun 18, 2026
Granular outbound rate limiting (hourly + daily + per-message recipient cap) Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 45/100

mailcow/mailcow-dockerized#7295 · Opened Jun 17, 2026

Showing the newest 100

This page lists what was indexed most recently. Advanced filter has the whole inventory, narrowed by language, difficulty and how long a task takes.

Open advanced filter

mailcow

Showing the newest 100

Get new issues in your inbox