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mailcow-signature
Exclaimer-style email signatures for self-hosted mailcow
Company-wide email signatures for mailcow, placed right below the newest reply – not after the whole quoted thread. Visual editor, 5 layouts, per-domain and per-person signatures, dark-mode aware logos. DKIM stays valid. Free & MIT-licensed.
We run our company mail on mailcow (self-hosted, in Germany). The one thing we missed from Microsoft 365 was proper signatures: mailcow's domain-wide footer always lands at the very bottom, after the entire quoted conversation.
So we built mailcow-signature: an rspamd plugin that finds the newest reply in Outlook, Gmail, Apple Mail, Thunderbird, SOGo & co. and inserts the signature right there – plus a web UI with a guided setup, ready-made layouts and a live dark-mode preview.
It runs before DKIM signing, never touches S/MIME/PGP or calendar invites, and if anything goes wrong the mail is sent unchanged. One-line installer, dry-run mode included.
Would love your feedback – especially from anyone running mailcow in production!
About mailcow-signature on Product Hunt
“Exclaimer-style email signatures for self-hosted mailcow”
mailcow-signature was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #324 on the daily leaderboard. Company-wide email signatures for mailcow, placed right below the newest reply – not after the whole quoted thread. Visual editor, 5 layouts, per-domain and per-person signatures, dark-mode aware logos. DKIM stays valid. Free & MIT-licensed.
On the analytics side, mailcow-signature competes within Email, Open Source, Developer Tools and GitHub — topics that collectively have 669.9k followers on Product Hunt. The dashboard above tracks how mailcow-signature performed against the three products that launched closest to it on the same day.
Who hunted mailcow-signature?
mailcow-signature was hunted by Louis. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of mailcow-signature including community comment highlights and product details, visit the product overview.
Louis
Hi Product Hunt 👋
We run our company mail on mailcow (self-hosted, in Germany). The one thing we missed from Microsoft 365 was proper signatures: mailcow's domain-wide footer always lands at the very bottom, after the entire quoted conversation.
So we built mailcow-signature: an rspamd plugin that finds the newest reply in Outlook, Gmail, Apple Mail, Thunderbird, SOGo & co. and inserts the signature right there – plus a web UI with a guided setup, ready-made layouts and a live dark-mode preview.
It runs before DKIM signing, never touches S/MIME/PGP or calendar invites, and if anything goes wrong the mail is sent unchanged. One-line installer, dry-run mode included.
Would love your feedback – especially from anyone running mailcow in production!