Authentication

Email authentication proves to inbox providers that your emails are legitimate. SplashSend handles some of this automatically:

  • SPF — Aligned via our verified sending domain
  • DKIM — You can add DKIM records to authenticate your own domain (Setup → Email Sender Setup → Authenticate domain)
  • List-Unsubscribe — Every email includes one-click unsubscribe headers

Bounce management

  • Hard bounces are suppressed immediately — we won’t email that address again
  • Soft bounces are retried, but after 3 failures the address is suppressed
  • Complaints (when someone marks your email as spam) trigger an immediate unsubscribe

Tips for better deliverability

  • Authenticate your domain with DKIM for the best inbox placement
  • Send to engaged subscribers — avoid emailing people who never open
  • Don’t use ALL CAPS or excessive exclamation marks in subject lines
  • Keep your list clean — remove bounced and unengaged contacts regularly
  • Keep images balanced — emails that are mostly images and no text often get flagged