Re: Setting up `send-email` for SSL, and then using GCM (Git Credential Manager)

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(added Git List back - should be non HTML now ;-)

On 16/04/2022 15:49, Ævar Arnfjörð Bjarmason wrote:
> I'm on mobile so sorry for the off list HTML, but

> 1. No it doesn't have GCM integration.

Thanks for clarifying that.

> 2. Have you tried debugging with e.g. stunnel and leaving the
> encryption out of git send email

Sounds useful. I hadn't realised what 'stunnel' did beforehand.. 
Hopefully it'll let me see how the server that hosts my domain is
responding (or not).
At the moment I'm doing my investigation from my win10 machine...

> 3. I find all things email so much less of a hassle by setting up a
> local "open relay" exim or other real MTA on my laptop.
>
I suspect (hope) that once I've cracked the access method to the remote
email server that I'll be able to set my gitconfig so that `send-email`
will Just Work(tm), minus the GCM aspiration ;-)

>
> Maybe that helps, maybe not, it sidesteps your questions a bit, but
> maybe in a way where you won't need to worry about git send email.

It has been a help.

Philip

>
> On Sat, Apr 16, 2022, 16:04 Philip Oakley <philipoakley@iee.email> wrote:
>
>     This maybe a wXYz-Problem. But I'm stuck at getting SSL to work with
>     `send-email`.
>
>     I'm trying to update both my home Windows PC (win10) and my Ubuntu
>     travel laptop (an old-Acer-i5) `send-email` setup/config to use my
>     personal email domain (with authentication), rather than my old
>     home ISP
>     locked (no auth) connection, but I'm struggling.
>
>     Z) Does the GCM (Git Credential Manager) integrate well with
>     send-email,
>     and what guidance is available for setting up and debugging the
>     `send-email` configuration?
>
>     Y) It's not clear what I should see in the terminal window in either
>     Git-for-Windows or Ubuntu when testing the `git send-email` command -
>     without/with using GCM.
>
>     w) Some back story. I set up my existing telephone-line-locked home
>     send-email config many years ago around the time of dial-up/ADSL. My
>     router logs into my ISP giving me an open port 25 for SMTP (though
>     doesn't advertise that any more). My config for the ISP is simple,
>     needing only the `smtpServer, smtpServerPort`, and my `from,
>     suppressfrom, & chainreplyto` settings. It works for both the Win
>     PC and
>     my Ubuntu laptop, but I can only use this when at home.
>
>     I also have a personal email domain (iee.email) whose authentication
>     works with Thunderbird for the WinPC at home, and the Ubuntu laptop at
>     home and when away from home.  I'd like to be able to use `
>     send-email`
>     via the personal email domain on the laptop when away from home (final
>     goal), and also match that `send-email` use on the Win PC (which would
>     also allow easy switching ISP when needed).
>
>     X) Where I've reached. I've discovered `sendemail.identity`, so at
>     least
>     I can have both configurations available for selection [7]. I've added
>     the --smtp-debug=1` with little insight. I've hit a brick wall with
>     respect to establishing the connection (I think). It's not clear
>     if any
>     authentication (password stuff) has started.
>
>     I fail to get the "<<<220 xxxxx   server ready" reply that my ISP
>     identity gives, rather I get "Net::SMTP: Net::Cmd::getline():
>     unexpected
>     EOF on command channel: Connection reset by peer ... Unable to
>     initialize SMTP properly. Check config and use --smtp-debug. VALUES:
>     server=smtp.hosts.co.uk <http://smtp.hosts.co.uk> encryption=
>     hello=localhost.localdomain port=465"
>
>     I've added below the terminal responses [1,3] and extracts of the
>     config
>     [2,4] for my test 'cover-letter'. Plus my Thunderbird settings [5] for
>     comparison. Git build [6]. Domain provider advice [8].
>
>     Thoughts: Maybe the setting I need for `git-end-email` don't match
>     those
>     used by Thunderbird; Is there extra debug info if I set some extra
>     parameters. Maybe some other tool can provide insight into what's
>     failing?
>
>     Any suggestions?
>     --
>     Philip
>
>     [1] Failing case
>     phili@Philip-Win10 MINGW64 /c/git-sdk-64/usr/src/git
>     (die_preserve_ggg)
>     $ git send-email --identity=Names   --to="Philip Oakley
>     <philipoakley@iee.email>" --smtp-debug=1  0000*.patch
>     0000-cover-letter.patch
>     Net::SMTP>>> Net::SMTP(3.13)
>     Net::SMTP>>>   Net::Cmd(3.13)
>     Net::SMTP>>>     Exporter(5.76)
>     Net::SMTP>>>   IO::Socket::IP(0.41)
>     Net::SMTP>>>     IO::Socket(1.46)
>     Net::SMTP>>>       IO::Handle(1.46)
>     Net::SMTP: Net::Cmd::getline(): unexpected EOF on command channel:
>     Connection reset by peer at C:/Program
>     Files/Git/mingw64/libexec/git-core\git-send-email line 1698.
>     Unable to initialize SMTP properly. Check config and use --smtp-debug.
>     VALUES: server=smtp.hosts.co.uk <http://smtp.hosts.co.uk>
>     encryption= hello=localhost.localdomain
>     port=465 at C:/Program
>     Files/Git/mingw64/libexec/git-core\git-send-email
>     line 1725.
>
>     phili@Philip-Win10 MINGW64 /c/git-sdk-64/usr/src/git
>     (die_preserve_ggg)
>
>     ---
>     [2]
>     [sendemail "Names"]
>         chainreplyto = false
>         from = Philip Oakley <philipoakley@iee.email>
>         suppressfrom = true
>         smtpServer = smtp.hosts.co.uk <http://smtp.hosts.co.uk>
>         smtpServerPort = 465
>         smptEncryption = ssl
>         smtpUser = iee.email
>
>         smtpPass = <password>
>
>     ----------------------
>     [3] Existing (passing) case
>     phili@Philip-Win10 MINGW64 /c/git-sdk-64/usr/src/git
>     (die_preserve_ggg)
>     $ git send-email --identity=TalkTalk   --to="Philip Oakley
>     <philipoakley@iee.email>" --smtp-debug=1  0000*.patch
>     0000-cover-letter.patch
>     Net::SMTP>>> Net::SMTP(3.13)
>     Net::SMTP>>>   Net::Cmd(3.13)
>     Net::SMTP>>>     Exporter(5.76)
>     Net::SMTP>>>   IO::Socket::IP(0.41)
>     Net::SMTP>>>     IO::Socket(1.46)
>     Net::SMTP>>>       IO::Handle(1.46)
>     Net::SMTP=GLOB(0x800c16240)<<< 220 cm4nec smtp.talktalk.net
>     <http://smtp.talktalk.net> ESMTP server
>     ready
>     Net::SMTP=GLOB(0x800c16240)>>> EHLO localhost.localdomain
>     Net::SMTP=GLOB(0x800c16240)<<< 250-cm4nec hello [84.13.159.41],
>     pleased
>     to meet you
>     Net::SMTP=GLOB(0x800c16240)<<< 250-HELP
>     Net::SMTP=GLOB(0x800c16240)<<< 250-SIZE 30000000
>     Net::SMTP=GLOB(0x800c16240)<<< 250-ENHANCEDSTATUSCODES
>     Net::SMTP=GLOB(0x800c16240)<<< 250-8BITMIME
>     Net::SMTP=GLOB(0x800c16240)<<< 250 OK
>     Net::SMTP=GLOB(0x800c16240)>>> MAIL FROM:<philipoakley@iee.email>
>     Net::SMTP=GLOB(0x800c16240)<<< 250 2.1.0 <philipoakley@iee.email>
>     sender ok
>     Net::SMTP=GLOB(0x800c16240)>>> RCPT TO:<philipoakley@iee.email>
>     Net::SMTP=GLOB(0x800c16240)<<< 250 2.1.5 <philipoakley@iee.email>
>     recipient ok
>     Net::SMTP=GLOB(0x800c16240)>>> DATA
>     Net::SMTP=GLOB(0x800c16240)<<< 354 OK
>     Net::SMTP=GLOB(0x800c16240)>>> From: Philip Oakley
>     <philipoakley@iee.email>
>     Net::SMTP=GLOB(0x800c16240)>>> To: Philip Oakley
>     <philipoakley@iee.email>
>     Net::SMTP=GLOB(0x800c16240)>>> Subject: [PATCH 0/1] *** Test Names ***
>     Net::SMTP=GLOB(0x800c16240)>>> Date: Sat, 16 Apr 2022 09:54:00 +0100
>     Net::SMTP=GLOB(0x800c16240)>>> Message-Id:
>     <20220416085400.277-1-philipoakley@iee.email>
>     Net::SMTP=GLOB(0x800c16240)>>> X-Mailer: git-send-email
>     2.36.0.rc0.windows.1
>     Net::SMTP=GLOB(0x800c16240)>>> MIME-Version: 1.0
>     Net::SMTP=GLOB(0x800c16240)>>> Content-Transfer-Encoding: 8bit
>     Net::SMTP=GLOB(0x800c16240)>>> *** Test BLURB  ***
>     [...]
>     Net::SMTP=GLOB(0x800c16240)>>> 2.36.0.rc0.windows.1
>     Net::SMTP=GLOB(0x800c16240)>>> .
>     Net::SMTP=GLOB(0x800c16240)<<< 250 2.0.0 feC1ntahZW5NofeC1ntcj4 mail
>     accepted for delivery
>     OK. Log says:
>     Server: smtp.talktalk.net <http://smtp.talktalk.net>
>     MAIL FROM:<philipoakley@iee.email>
>     RCPT TO:<philipoakley@iee.email>
>     From: Philip Oakley <philipoakley@iee.email>
>     To: Philip Oakley <philipoakley@iee.email>
>     Subject: [PATCH 0/1] *** Test Names ***
>     Date: Sat, 16 Apr 2022 09:54:00 +0100
>     Message-Id: <20220416085400.277-1-philipoakley@iee.email>
>     X-Mailer: git-send-email 2.36.0.rc0.windows.1
>     MIME-Version: 1.0
>     Content-Transfer-Encoding: 8bit
>
>     Result: 250
>     Net::SMTP=GLOB(0x800c16240)>>> QUIT
>     Net::SMTP=GLOB(0x800c16240)<<< 221 2.0.0 cm4nec smtp.talktalk.net
>     <http://smtp.talktalk.net>
>     closing connection
>
>     phili@Philip-Win10 MINGW64 /c/git-sdk-64/usr/src/git
>     (die_preserve_ggg)
>
>     ---
>     [4]
>     [sendemail "TalkTalk"]
>         chainreplyto = false
>         from = Philip Oakley <philipoakley@iee.email>
>         suppressfrom = true
>         smtpServer = smtp.talktalk.net <http://smtp.talktalk.net>
>         smtpServerPort = 25
>
>     [5] Thunderbird (IMAP) Server Settings (gui)
>     ServerName: imap.hosts.co.uk <http://imap.hosts.co.uk>
>     ServerPort: 993
>     UserName: iee.email
>     ConnectionSecurity: SSL/TLS    [None|StartTLS|Ssl/tls]
>     AuthMethod: NormalPass     
>     [Normal|Encrypted|Kerebos/Gssapi|NTLM|TLScert|Oath2]
>     --
>     Thunderbird Outgoing SMPTP Server
>     smtp.hosts.co.uk <http://smtp.hosts.co.uk>
>     465
>     SSL/TLS
>     NormalPassword
>     iee.email
>
>     [6] Git Build details
>     phili@Philip-Win10 MINGW64 /c/git-sdk-64/usr/src/git
>     $ git --version --build-options
>     git version 2.36.0.rc0.windows.1
>     cpu: x86_64
>     built from commit: c61dcf9cfa725959a79a3fb61d63bc05cc13ac7a
>     sizeof-long: 4
>     sizeof-size_t: 8
>     shell-path: /bin/sh
>     feature: fsmonitor--daemon
>
>     phili@Philip-Win10 MINGW64 /c/git-sdk-64/usr/src/git
>     $ cat /etc/install-options.txt
>     Editor Option: Notepad++
>     Custom Editor Path:
>     Default Branch Option: main
>     Path Option: Cmd
>     SSH Option: OpenSSH
>     Tortoise Option: false
>     CURL Option: OpenSSL
>     CRLF Option: CRLFAlways
>     Bash Terminal Option: MinTTY
>     Git Pull Behavior Option: Merge
>     Use Credential Manager: Enabled
>     Performance Tweaks FSCache: Enabled
>     Enable Symlinks: Disabled
>     Enable Pseudo Console Support: Disabled
>     Enable FSMonitor: Disabled
>
>     [7] sendemail.identity now comes straight after the new safe.directory
>     entry - serendipity ..
>
>     [8] Names domain smtp advice
>     https://www.names.co.uk/support/articles/sending-emails-via-alternate-smtp-ports/
>     [Use SSL/465]
>
>




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