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SMTP Guide ​

Mailisk ships with a virtual SMTP relay so you can exercise email flows end-to-end without touching production mail infrastructure or harming your sending reputation. Every namespace gets its own SMTP credentials and messages are delivered instantly into the same namespace inbox.

Retrieve credentials ​

  1. Open the namespace in the dashboard and click Additional settings → SMTP settings.
  2. Or call GET /api/smtp/{namespace}/settings from your CI job to fetch the current host, port, username, and password.
sh
curl --request GET \
     --url https://api.mailisk.com/api/smtp/{namespace}/settings \
     --header 'Accept: application/json' \
     --header 'X-Api-Key: {Api Key}'

Key points:

  • The from and to addresses must end with @{namespace}.mailisk.net.
  • Mailisk does not throttle virtual SMTP traffic, but each delivered message still counts toward the namespace's inbound quota.