mailcow

Issues somebody may already be working on are listed last. List everything by date

• Mailbox group IMAP grants fail when owner has shared folders

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  bug

  Difficulty 1/5 Under an hour Newbie friendliness 84/100

  mailcow/mailcow-dockerized#7652 · 2 comments · Opened Nov 12, 2026

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• Watchdog webhook body empty

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  bug

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

  mailcow/mailcow-dockerized#7651 · Opened Nov 12, 2026

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• Enhance rspamd logs (UI) and stats (API)

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  enhancement

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

  mailcow/mailcow-dockerized#7650 · 2 comments · Opened Nov 12, 2026

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• [SOGo 5.12.13] vCard 4.0 PUT is down-converted to 3.0 with UTF-8 mojibake and leftover `tel:` URI

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  Difficulty 4/5 3-5 days Newbie friendliness 47/100

  mailcow/mailcow-dockerized#7647 · Opened Nov 11, 2026

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• [SOGo] GAL address book: CardDAV addressbook-query always returns 501 (`nil c_uid`)

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  Difficulty 3/5 1-2 days Newbie friendliness 62/100

  mailcow/mailcow-dockerized#7646 · Opened Nov 11, 2026

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• Domain-wide footer breaks mailbox rate limits: RATELIMIT_UPDATE never runs, pending counter leaks

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

  mailcow/mailcow-dockerized#7644 · 2 comments · Opened Nov 10, 2026

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• MailSync produces duplicates in target mailbox

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  bug not reproduceable

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

  mailcow/mailcow-dockerized#7612 · 3 comments · Opened Nov 8, 2026

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• OIDC Login Screen

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  enhancement

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

  mailcow/mailcow-dockerized#7611 · Opened Nov 8, 2026

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• 2026-11: IMAP/EAS logins fail due to outdated local passwd-verify.lua

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  information not-a-bug

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

  mailcow/mailcow-dockerized#7605 · 3 comments · Opened Nov 6, 2026

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• 2026-11: Admin UI shows no domains/mailboxes after update with Roundcube admin login customization

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  information not-a-bug

  Difficulty 3/5 1-2 days Newbie friendliness 43/100

  mailcow/mailcow-dockerized#7601 · 20 comments · 1 reaction · Opened Nov 5, 2026

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• enhance filter detection with zalgo detection

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  enhancement

  Difficulty 4/5 3-5 days Newbie friendliness 43/100

  mailcow/mailcow-dockerized#7587 · 1 reaction · Opened Nov 4, 2026

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• Dovecot ofelia jobs never run if ofelia starts while dovecot is down (Redis logs grow without limits)

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  bug

  Difficulty 4/5 3-5 days Newbie friendliness 57/100

  mailcow/mailcow-dockerized#7582 · Opened Oct 30, 2026

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• Rebuild containers to remove compromised eMudhra Intermediate CA certificates

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  enhancement

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

  mailcow/mailcow-dockerized#7575 · 2 comments · Opened Oct 29, 2026

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• dovecot stuck on 2.3.21.1: CVE-2026-33604 and CVE-2026-40020 are only fixed in 2.4.5

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

  mailcow/mailcow-dockerized#7554 · 3 comments · 1 reaction · Opened Oct 26, 2026

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• Send out TLS reports

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  enhancement

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

  mailcow/mailcow-dockerized#7553 · 3 reactions · Opened Oct 25, 2026

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• Global Sieve Prefilter Reset After Upgrade

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  bug

  Difficulty 3/5 1-2 days Newbie friendliness 57/100

  mailcow/mailcow-dockerized#7541 · 1 comment · Opened Oct 22, 2026

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• Syncjob and delete source mails older of x days

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  enhancement

  Difficulty 4/5 3-5 days Newbie friendliness 54/100

  mailcow/mailcow-dockerized#7531 · Opened Oct 20, 2026

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• Spam learning via "move to Junk" stores local fuzzy hash only half the time since 2026-07

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  bug upstream

  Difficulty 4/5 3-5 days Newbie friendliness 46/100

  mailcow/mailcow-dockerized#7526 · 1 comment · Opened Oct 19, 2026

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• Rspamd history: Sync table filtering with pie chart legend toggles

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  enhancement

  Difficulty 3/5 1-2 days Newbie friendliness 67/100

  mailcow/mailcow-dockerized#7511 · Opened Oct 11, 2026

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• Shared mailboxes: per-delegate `INDEX=` makes full-text search time out for delegates (FTS index of the owner is never used)

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

  mailcow/mailcow-dockerized#7510 · Opened Oct 10, 2026

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• Undefined variable warnings break JSON in WebAuthn/FIDO2 registration when registering the first credential

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  Difficulty 2/5 1-3 hours Newbie friendliness 85/100

  mailcow/mailcow-dockerized#7508 · Opened Oct 8, 2026

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• Quarantine, add "ban ip"

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  enhancement

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

  mailcow/mailcow-dockerized#7499 · Opened Oct 2, 2026

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• Feature request: per-mailbox webhook for inbound mail (next to Pushover)

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

  mailcow/mailcow-dockerized#7497 · Opened Oct 1, 2026

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• Dovecot: include dovecot-gssapi to allow Kerberos (GSSAPI) authentication

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  enhancement

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

  mailcow/mailcow-dockerized#7496 · Opened Oct 1, 2026

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• [Feature Request] ntfy or Gotify additionally to pushover for push notifications

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  enhancement

  Difficulty 5/5 Over a week Newbie friendliness 30/100

  mailcow/mailcow-dockerized#7493 · 1 reaction · Opened Sep 30, 2026

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• Allow LDAP Authentication using samAccountName

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  enhancement

  Difficulty 4/5 3-5 days Newbie friendliness 55/100

  mailcow/mailcow-dockerized#7486 · 1 comment · Opened Sep 26, 2026

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• Option to Disable Password Changes for Email Users

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  enhancement

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

  mailcow/mailcow-dockerized#7478 · Opened Sep 21, 2026

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• POSTMASTER_HANDLER prefilter unconditionally bypasses spam scoring for postmaster@ mail — no safe way to customize via local.d

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

  mailcow/mailcow-dockerized#7469 · 5 comments · Opened Sep 18, 2026

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• Feature Request: Prometheus Metrics for Authenticated SMTP Activity per Mailbox

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  enhancement

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

  mailcow/mailcow-dockerized#7465 · Opened Sep 14, 2026

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• Exclude Mailcow-managed domains from newly registered domain URI checks

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  enhancement

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

  mailcow/mailcow-dockerized#7464 · Opened Sep 13, 2026

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• 405 Method Not Allowed on "Download all attachments" in Bulgarian

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  bug stale

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

  mailcow/mailcow-dockerized#7462 · 1 comment · Opened Sep 11, 2026

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• SoGo high memory consumption after 2027-07b

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  bug stale

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

  mailcow/mailcow-dockerized#7452 · 1 comment · Opened Sep 4, 2026

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• Include aliases in SOGo general adressebook

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  enhancement

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

  mailcow/mailcow-dockerized#7451 · 1 comment · 3 reactions · Opened Sep 3, 2026

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• Proton Style Encryption

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  enhancement

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

  mailcow/mailcow-dockerized#7448 · 1 comment · Opened Aug 31, 2026

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• Per-domain default rate limit that applies individually per mailbox

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  enhancement

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

  mailcow/mailcow-dockerized#7445 · Opened Aug 29, 2026

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• Feature Request: Support GBK / GB2312 character encoding in SOGo webmail

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  enhancement

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

  mailcow/mailcow-dockerized#7421 · 1 comment · Opened Aug 17, 2026

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• Delete mailbox via API - Access Denied

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  not reproduceable

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

  mailcow/mailcow-dockerized#7411 · 3 comments · Opened Aug 11, 2026

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• Audit Log for Administrative Mailbox Access

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  enhancement

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

  mailcow/mailcow-dockerized#7408 · 3 reactions · Opened Aug 10, 2026

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• Alias marked as "Visible in SOGo" does not appear in SOGo recipient autocomplete (To/Cc/Bcc)

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  bug upstream

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

  mailcow/mailcow-dockerized#7397 · 10 comments · Opened Aug 4, 2026

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• IDN domains: login to mailcow requires use of punycode representation of email address

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  bug

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

  mailcow/mailcow-dockerized#7395 · 2 comments · Opened Aug 2, 2026

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• Proposal to modernize the SOGo user interface and contribute a new design

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  enhancement

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

  mailcow/mailcow-dockerized#7382 · 2 comments · Opened Jul 29, 2026

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• Make the different login portals MUCH more obvious

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  enhancement

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

  mailcow/mailcow-dockerized#7327 · 4 comments · 8 reactions · Opened Jul 13, 2026

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• Support JMAP using JSON APIs over HTTP

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  enhancement

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

  mailcow/mailcow-dockerized#7314 · 1 comment · 7 reactions · Opened Jul 2, 2026

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• UI Arabic + Thai Internationalisation

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  enhancement

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

  mailcow/mailcow-dockerized#7313 · 3 comments · Opened Jul 2, 2026

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• spamaddress generation for all domains a mailbox has a alias to

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  enhancement

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

  mailcow/mailcow-dockerized#7304 · Opened Jun 22, 2026

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• Support multiple DNS provider credentials for ACME DNS-01 challenges

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  enhancement

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

  mailcow/mailcow-dockerized#7298 · 2 reactions · Opened Jun 18, 2026

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• Customise username generation for spam email aliases

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  enhancement

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

  mailcow/mailcow-dockerized#7297 · Opened Jun 18, 2026

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• Granular outbound rate limiting (hourly + daily + per-message recipient cap)

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  enhancement

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

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

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• simple mail counter

  May be free again @MannXo claimed this 165 days ago, and no pull request is open. Open

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  enhancement

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

  mailcow/mailcow-dockerized#7268 · 2 comments · Opened May 31, 2026

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• rspamd retrieving config from fuzzy.mailcow.email via plain http

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  confirmed enhancement neverstale not-a-bug security

  Difficulty 2/5 1-3 hours Newbie friendliness 62/100

  mailcow/mailcow-dockerized#7266 · 6 comments · Opened May 28, 2026

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