The traffic on port 25 starts as unencrypted. You can use two methods for encrypting the SMTP traffic: SMTP on port 25 with STARTTLS if TLS encryption is supported. Our ISP cannot see any traffic related problems. Webmail (Rainloop), smtp & imap authentication fails even though admin login works. The SMTP protocol server sends outgoing email messages, receives incoming messages and messages created via mailing lists in Kerio Connect.
Internal telnet: instant connect, instant 220 responseĮxternal telnet: instant connect, after 10 sec a 220 response. Telnet on this test mailserver respond fine in every way( 10 sec greeting delay, local clients excluded) I set up a test kerio connect on another virutal machine ( same host server ) and set the same rules in the cisco firewall for acl and nat-ing entries. Internal telnet: instant connect, instant 220 responseĮxternal telnet: instant connect, after 35 sec a 220 response Server name and listening port are correct. Unchecking the greeting delay at all comes with the same behaviour: telnet smtpservername 25 the following message appears Could not open connection to the host, on port 25: Connect failed. If i uncheck to exclude the local clients from the greeting delay the same telnet also connects immediately but gets a 220 response after 10 seconds.Ī telnet from an external address also connects immediately but the 220 response comes after 45 seconds. The greeting delay under spam repellent is configured to 10seconds with excluding local clients.Ī "telnet serveraddress" 25 in our internal network connects immediately and gets a 220 response from our mailserver with no delay.
KERIO CONNECT SMTP TELNET BANNER WINDOWS
Windows Server 2008 R2 ( all latest updates applied ) We are having the problem that our mailserver is delaying the smtp greeting delay too long for external connections. Home » GFI User Forums » Kerio Connect » SMTP Greeting Delay Show: Today's Messages :: Show Polls :: Message Navigator
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