diff --git a/.travis.yml b/.travis.yml
index 2fd4fc9d..69d2bbd7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,8 +12,9 @@ script:
 after_script:
 - make clean
 env:
-- ENABLE_CLAMAV=1 ENABLE_SPAMASSASSIN=1 ENABLE_FAIL2BAN=1 ONE_DIR=1 ENABLE_POP3=1 ENABLE_MANAGESIEVE=1 ENABLE_FETCHMAIL= 1 PERMIT_DOCKER=host    DMS_DEBUG=0 SA_TAG=1.0 SA_TAG2=2.0 SA_KILL=3.0 VIRUSMAILS_DELETE_DELAY=7 SASL_PASSWD="external domain.com username:password"
-- ENABLE_CLAMAV=0 ENABLE_SPAMASSASSIN=0 ENABLE_FAIL2BAN=0 ONE_DIR=0 ENABLE_POP3=0 ENABLE_MANAGESIEVE=0 ENABLE_FETCHMAIL= 0 PERMIT_DOCKER=network DMS_DEBUG=1 SA_TAG=    SA_TAG2=    SA_KILL=    VIRUSMAILS_DELETE_DELAY=  
+- SMTP_ONLY=0 ENABLE_CLAMAV=1 ENABLE_SPAMASSASSIN=1 ENABLE_FAIL2BAN=1 ONE_DIR=1 ENABLE_POP3=1 ENABLE_MANAGESIEVE=1 ENABLE_FETCHMAIL=1 PERMIT_DOCKER=host    DMS_DEBUG=0 SA_TAG=1.0 SA_TAG2=2.0 SA_KILL=3.0 VIRUSMAILS_DELETE_DELAY=7 SASL_PASSWD="external domain.com username:password"
+- SMTP_ONLY=0 ENABLE_CLAMAV=0 ENABLE_SPAMASSASSIN=0 ENABLE_FAIL2BAN=0 ONE_DIR=0 ENABLE_POP3=0 ENABLE_MANAGESIEVE=0 ENABLE_FETCHMAIL=0 PERMIT_DOCKER=network DMS_DEBUG=1
+- SMTP_ONLY=1
 
 notifications:
   slack: