I have an IMAP
account on a private server and they said me to configure my mail with a STARTTLS
secure connection on the port 993 and authentication with standard password.
How can I set STARTTLS
in Mail.app
?
emailmail.app
I have an IMAP
account on a private server and they said me to configure my mail with a STARTTLS
secure connection on the port 993 and authentication with standard password.
How can I set STARTTLS
in Mail.app
?
Best Answer
First of all, notice that port 993 usually does not use
STARTTLS
. If you have been told to use port 993 andSTARTTLS
, then that would be very strange indeed. The different betweenSTARTTLS
and ordinary SSL/TLS is the following: With ordinary SSL/TLS, which is what is usually used on Port 993, the connection immediately starts with an SSL/TLS handshake. In layman's terms, one may say that the connection is immediately encrypted. However, when usingSTARTTLS
, which is usually used in combination with Port 143, the connection starts unecrypted. The first IMAP commands exchanged between client and server (including theSTARTTLS
command) are unencrypted. However, after theSTARTTLS
command, both client and server upgrade the unencrypted connection to an encrypted one. That means the SSL/TLS handshake is not done immediately, but only after the client has sent theSTARTTLS
command to the server. That's all.Now sadly, I have experienced that Apple's Mail App does not support
STARTTLS
on Port 143 and seems to only support encrypted IMAP connections over Port 993 using SSL/TLS.