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docs: git-send-email: difference between ssl and tls smtp-encryption

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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>
This commit is contained in:
Sotir Danailov 2022-10-12 17:06:19 +02:00 committed by Junio C Hamano
parent 3dcec76d9d
commit a2634646eb
1 changed files with 12 additions and 3 deletions
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15
Documentation/git-send-email.txt
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@ -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