diff --git a/boltcard.service b/boltcard.service
index b6b76e4..90344ce 100644
--- a/boltcard.service
+++ b/boltcard.service
@@ -46,6 +46,7 @@ Environment="FEE_LIMIT_SAT=10"
 # Environment="AWS_SES_ID="
 # Environment="AWS_SES_SECRET="
 # Environment="AWS_SES_EMAIL_FROM="
+# Environment="EMAIL_MAX_TXS=10"
 
 # LN_TESTNODE may be used in testing and will then only pay to the defined test node pubkey
 #Environment="LN_TESTNODE=000000000000000000000000000000000000000000000000000000000000000000"