diff --git a/muttrc b/muttrc
index 5d1e63c..8cbbab4 100644
--- a/muttrc
+++ b/muttrc
@@ -5,13 +5,14 @@ set from = 'kunden@maketank.net' # default: '(empty)'
 set realname="Buchhaltung: it.maketank.net"
 set use_envelope_from=yes
 
+set ssl_starttls = yes
 set imap_authenticators = 'login' # default: '(empty)'
 set imap_login = 'kunden@maketank.net' # default: '(empty)'
 set imap_pass = 'de3hujmn' # default: '(empty)'
 set imap_user = 'kunden@maketank.net' # default: '(empty)'
 set smtp_authenticators = 'login'
 set smtp_pass= 'de3hujmn'
-set smtp_url = "smtp://kunden@maketank.net@smtp.maketank.net:465"  # using port 587 for TLS
+set smtp_url = "smtp://kunden@maketank.net@smtp.maketank.net:587"  # using port 587 for TLS
 #set sendmail="/usr/bin/esmtp"
 set pgp_sort_keys = 'address' # default: 'address'
 set pgp_use_gpg_agent = yes # default: no