Allow SMTP Submission if you use a distributed domain. SMTP Submission is a special type of communication which enables messages sent by an authenticated user to be delivered immediately without antispam control. In such cases users cannot send email out of the network. Since public WiFi networks often do not support traffic on unencrypted protocols, SMTP on port 25 can be blocked. If both sides support TLS, TLS is started via STARTTLS. The traffic on port 25 starts as unencrypted. SMTP on port 25 with STARTTLS if TLS Transport Layer Security - A follower of the SSL protocol and ensures secure communication between networks.You can use two methods for encrypting the SMTP traffic: protocol server sends outgoing email messages, receives incoming messages and messages created via mailing lists in Kerio Connect. The SMTP Simple Mail Transport Protocol - An internet standard used for email transmission across IP networks. The following sections describe individual services. for each instance of the service on the same port (not recommended if you reserve IP addresses dynamically, for example, via DHCP Dynamic Host Configuration Protocol - A protocol that automatically gives IP addresses and additional configuration to hosts in a network.)Įach service is available in both unsecured and secured version (encrypted by SSL Secure Sockets Layer - A protocol that ensures integral and secure communication between networks.). Reserve a different IP address An identifier assigned to devices connected to a TCP/IP network.Change the traffic port for one of the services.If any service available in Kerio Connect is already running on the server, you have two possibilities: Consider the number of server users -For an unlimited number of connections, set the value to 0 Specify the maximum number of concurrent connections.Limit access to the service for specific IP addresses.Add or remove listening IP addresses and ports. ![]()
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