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Checkout the classic dashboard ui for daptin

docker run -p 8080:8080 daptin/dashboard-classic

Create a mail server entry with a hostname

curl 'http://localhost:8080/api/mail_server' -X POST \
  -H 'Content-Type: application/vnd.api+json' \
  -H 'Authorization: Bearer <TOKEN>' \
  --data-raw '{"data":{"type":"mail_server","attributes":{"always_on_tls":true,"authentication_required":true,"hostname":"","is_enabled":true,"listen_interface":"","max_clients":"20","max_size":"10000","permission":0,"xclient_on":false}},"meta":{}}'

Create a new mail account

curl 'http://localhost:8080/api/mail_account' -X POST \
  -H 'Content-Type: application/vnd.api+json' \
  -H 'Authorization: Bearer <TOKEN>' \
  --data-raw '{"data":{"type":"mail_account","attributes":{"password":"password","password_md5":"password","permission":0,"username":"email-address"},"relationships":{"mail_server_id":{"data":{"id":"e494c2d1-ff68-4ed5-bf9c-b4804aeec0fb","type":"mail_server"}}}},"meta":{}}'

Enable IMAP

Three config entries

  • imap.enabled
  • imap.listen_interface
  • hostname
curl --location --request POST 'localhost:6336/_config/backend/imps.enabled' \
    --header 'Content-Type: application/json' \
    --header 'Authorization: Bearer <TOKEN>' \
    --data-raw 'true'

curl --location --request POST 'localhost:6336/_config/backend/imap.listen_interface' \
    --header 'Content-Type: application/json' \
    --header 'Authorization: Bearer <TOKEN>' \
    --data-raw ''

curl --location --request POST 'localhost:6336/_config/backend/hostname' \
    --header 'Content-Type: application/json' \
    --header 'Authorization: Bearer <TOKEN>' \
    --data-raw ''

The mail account created earlier should be able to access the SMTP/IMAP interface to send and receive email.


Make sure you have a SSL certificate created against the addresses you want to send mail from

Check the certificate page.

DKIM Selector is: d1

DKIM DNS record example

. TXT v=DKIM1; p=

s= indicates the selector record name used with the domain to locate the public key in DNS. The value is a name or number created by the sender. s= is included in the DKIM signature.
d= indicates the domain used with the selector record (s=) to locate the public key. The value is a domain name owned by the sender. d= is included in the DKIM signature.
p= indicates the public key used by a mailbox provider to match to the DKIM signature.

Here is what the full DNS DKIM record looks like for 600 IN TXT "v=DKIM1\; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC1TaNgLlSyQMNWVLNLvyY/neDgaL2oqQE8T5illKqCgDtFHc8eHVAU+nlcaGmrKmDMw9dbgiGk1ocgZ56NR4ycfUHwQhvQPMUZw0cveel/8EAGoi/UyPmqfcPibytH81NFtTMAxUeM4Op8A6iHkvAMj5qLf4YRNsTkKAV;"

The selector (s=): d1
The domain (d=):
The version (v=): DKIM1
The public key (p=): MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC1TaNgLlSyQMNWVLNLvyY/neDgaL2oqQE8T5illKqCgDtFHc8eHVAU+nlcaGmrKmDMw9dbgiGk1ocgZ56NR4ycfUHwQhvQPMUZw0cveel/8EAGoi/UyPmqfcPibytH81NFtTMAxUeM4Op8A6iHkvAMj5qLf4YRNsTkKAV

Required tag

p= is the public key used by a mailbox provider to match to the DKIM signature generated using the private key. The value is a string of characters representing the public key. It is generated along with its corresponding private key during the DKIM set-up process.

Daptin will (try to) sign all external mails from the SMTP server using the key against the FromMail hostname


Restart the server to start/update listening to as the SMTP server/IMAP server

curl 'http://localhost:8080/action/world/restart_daptin' -X POST \
    -H 'Authorization: Bearer <TOKEN>' \
    -H 'Content-Type: application/json;charset=utf-8' \
    --data-raw '{"attributes":{}}'