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maildev

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maildev
:mailbox: SMTP Server + Web Interface for viewing and testing emails during development.

TypeScript · 6101 stars

Beginner friendly Everything

Open All

Add integration coverage for the `/email/:id/html` route ↔ attachment URL pairing Open

enhancement

Difficulty 2/5 1-3 hours Newbie friendliness 86/100

maildev/maildev#585 · Opened Sep 16, 2026
`cid:` references in `href` attributes (e.g. linked PDFs) are never rewritten Open

enhancement

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

maildev/maildev#584 · Opened Sep 16, 2026
replaceCidReferences never fires for mailparser-parsed mail — inline non-image parts render as broken `cid:` images Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 78/100

maildev/maildev#583 · Opened Sep 16, 2026
Consider migrating from MailParser to postal-mime Open

dependencies enhancement

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

maildev/maildev#534 · 1 comment · Opened Jul 7, 2026
Feature request: Outgoing OAuth2 Open

enhancement

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

maildev/maildev#526 · 1 comment · Opened Jan 20, 2026
The `punycode` module is deprecated. Open

dependencies

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

maildev/maildev#519 · 6 comments · Opened Jul 30, 2025
Memory exception - JavaScript heap out of memory Open

bug

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

maildev/maildev#517 · 2 comments · Opened Feb 27, 2025
Ability to choose log Format: Single-line JSON vs Multi-line JSON Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 50/100

maildev/maildev#516 · 1 comment · Opened Feb 24, 2025
Support SASL XOAUTH2 for incoming part Open

enhancement

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

maildev/maildev#503 · 1 comment · Opened Nov 15, 2024
Enable "Relay to" option but disable "Relay" to actual recipient Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 48/100

maildev/maildev#496 · 1 comment · Opened Jun 14, 2024
MAILDEV_INCOMING_SECURE breaks the SMTP server Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 50/100

maildev/maildev#492 · 6 comments · Opened May 24, 2024
maildev does not allow STARTTLS advertising Open

enhancement

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

maildev/maildev#468 · 1 comment · 1 reaction · Opened Aug 29, 2023
Maildev behind apache virtual directory fails to load CID:Images Open

bug

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

maildev/maildev#439 · 1 comment · Opened Dec 8, 2022
prometheus monitoring endpoint Open

enhancement

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

maildev/maildev#434 · 1 comment · 2 reactions · Opened Oct 28, 2022
Support for the Amazon SES API Open

enhancement

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

maildev/maildev#432 · 1 comment · 3 reactions · Opened Aug 20, 2022
Support encrypted passwords for MAILDEV_INCOMING_PASS Open

enhancement

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

maildev/maildev#427 · 1 comment · 1 reaction · Opened Jul 24, 2022
MAILDEV_AUTO_RELAY stop working after x mails Open

bug

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

maildev/maildev#423 · 1 comment · 1 reaction · Opened Jul 1, 2022
Application stops when timeout is reached Open

bug

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

maildev/maildev#422 · 1 comment · Opened Jun 22, 2022
Feature request: automatically publish to npm via Github Actions Open

enhancement planned

Difficulty 3/5 1-2 days Newbie friendliness 64/100

maildev/maildev#404 · 3 comments · Opened Apr 4, 2022
Multiple types of outgoing support Open

discuss enhancement

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

maildev/maildev#394 · 2 comments · Opened Mar 24, 2022
feat: Pagination support on mail list Open

enhancement

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

maildev/maildev#392 · 3 comments · Opened Mar 24, 2022
feat: Retention and archive policy support Open

discuss feature

Difficulty 5/5 Over a week Newbie friendliness 38/100

maildev/maildev#391 · 4 comments · Opened Mar 24, 2022
No way to disable secure connection to a relay smtp server using port 587 for cleartext Open

enhancement

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

maildev/maildev#377 · 2 comments · Opened Feb 10, 2022
Unable to switch on HTTPS via environment variable in containerized MailDev 2.0 beta Open

bug

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

maildev/maildev#294 · 1 comment · 1 reaction · Opened Apr 7, 2020
Temporary directory on multi-user systems Open

bug

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

maildev/maildev#290 · 1 comment · 4 reactions · Opened Mar 23, 2020
Embedded images using Docker Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 48/100

maildev/maildev#266 · 1 comment · 1 reaction · Opened Sep 17, 2019
Feature Request: Add a rule to drop mail for certain addresses Open

enhancement

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

maildev/maildev#250 · 2 comments · 1 reaction · Opened May 14, 2019
`reply-to` field Open

bug

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

maildev/maildev#230 · 2 comments · Opened Aug 21, 2018
Workspaces Open

enhancement

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

maildev/maildev#205 · 5 comments · 2 reactions · Opened Mar 11, 2018
Add an option to keep only the last n messages Open

enhancement planned

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

maildev/maildev#127 · 7 comments · 1 reaction · Opened Jul 6, 2016
Docker documentation Open

docs

maildev/maildev#115 · 16 comments · 1 reaction · 1 assignee · Opened May 1, 2016
SMTP port does not accept messages when network is unavailable Open

bug

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

maildev/maildev#104 · 3 comments · 2 reactions · Opened Jan 21, 2016
Notification on receive Open

enhancement planned

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

maildev/maildev#73 · 9 comments · 1 reaction · Opened Jun 18, 2015
Group emails by to Open

enhancement planned

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

maildev/maildev#43 · 6 comments · Opened Dec 19, 2014

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