Transport Layer Security (TLS) is an encryption method that is used to encrypt a communication channel between two computers. It is the successor to Secure Socket Layer (SSL), and the two terms are often used interchangeably.
What is TLS?
TLS is widely used to encrypt connections over the Internet. For example, when a lock appears in your browser bar, your browser is encrypting communications between you and the website that you are connected to.
TLS can be used to encrypt email during transmission. Some recipients require it and refuse mail that is not TLS encrypted, but this practice is not common yet. There is a strong push to make the use of TLS a default.
Does Acoustic Campaign encrypt with TLS?
Our systems utilize Opportunistic TLS Encryption. Which means that we attempt to open a TLS Encrypted connection to the destination mail servers at each ISP. If the destination server is configured for, and accepts TLS Encrypted connections, it will connect and deliver the mail. If the destination server is not configured for, and does not accept TLS Encrypted connections, then the mail is delivered using unencrypted connection.
For more information about TLS, see the following websites: