diff --git a/.env.production.sample b/.env.production.sample
index 44ca984b8..d7c04e235 100644
--- a/.env.production.sample
+++ b/.env.production.sample
@@ -29,6 +29,7 @@ OTP_SECRET=
 # DEFAULT_LOCALE=de
 
 # E-mail configuration
+# Note: Mailgun and SparkPost (https://sparkpo.st/smtp) each have good free tiers
 SMTP_SERVER=smtp.mailgun.org
 SMTP_PORT=587
 SMTP_LOGIN=