docs: git-send-email: difference between ssl and tls smtp-encryption
New explanation for the difference between these values. It's hard to understand what they do based only on the names. New description of used default ports. Signed-off-by: Sotir Danailov <sndanailov@wired4ever.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Sotir Danailov committed
Oct 12, 2022 at 17:06 UTC
a2634646eba81923b66fa752535e24969be2fa82
1 file changed
+12
-3
Documentation/git-send-email.txt
+12
-3
index 3290043053..765b2df853 100644
--- a/Documentation/git-send-email.txt
+++ b/Documentation/git-send-email.txt
@@ -178,9 +178,18 @@ Sending
for `sendmail` in `/usr/sbin`, `/usr/lib` and $PATH.
--smtp-encryption=<encryption>::
- Specify the encryption to use, either 'ssl' or 'tls'. Any other
- value reverts to plain SMTP. Default is the value of
- `sendemail.smtpEncryption`.
+ Specify in what way encrypting begins for the SMTP connection.
+ Valid values are 'ssl' and 'tls'. Any other value reverts to plain
+ (unencrypted) SMTP, which defaults to port 25.
+ Despite the names, both values will use the same newer version of TLS,
+ but for historic reasons have these names. 'ssl' refers to "implicit"
+ encryption (sometimes called SMTPS), that uses port 465 by default.
+ 'tls' refers to "explicit" encryption (often known as STARTTLS),
+ that uses port 25 by default. Other ports might be used by the SMTP
+ server, which are not the default. Commonly found alternative port for
+ 'tls' and unencrypted is 587. You need to check your provider's
+ documentation or your server configuration to make sure
+ for your own case. Default is the value of `sendemail.smtpEncryption`.
--smtp-domain=<FQDN>::
Specifies the Fully Qualified Domain Name (FQDN) used in the