How to set proxy for smtpmail.el ?

How to set proxy for smtpmail.el ?

[numbchild]

I'm unable to send email with smtpmail.el

I think it might be because of the internet censorship firewall in China.
So I decided to use a proxy for smtpmail. I have not found the smtpmail
options for setting proxy. Then I dive into `smtpmail-send-it` function
source code. Found it uses `open-network-stream` to send email. Then the
question is then how to set a proxy for `open-network-stream`? I checked
this function's arguments. No result.

Thank you in advance here.

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Re: How to set proxy for smtpmail.el ?

[Robert Pluim]

>>>>> On Mon, 20 Jul 2020 10:50:39 +0800, "numbchild@gmail.com" <numbchild@gmail.com> said:

    stardiviner> I'm unable to send email with smtpmail.el
    stardiviner> I think it might be because of the internet censorship firewall in China.
    stardiviner> So I decided to use a proxy for smtpmail. I have not found the smtpmail
    stardiviner> options for setting proxy. Then I dive into `smtpmail-send-it` function
    stardiviner> source code. Found it uses `open-network-stream` to send email. Then the
    stardiviner> question is then how to set a proxy for `open-network-stream`? I checked
    stardiviner> this function's arguments. No result.

SMTP via a proxy sounds like a bad idea: you give the proxy access to
all your email. Having said that, thereʼs a socks.el which contains
'socks-open-network-stream' that might work for you. Iʼve not tried it
myself.

Robert

Re: How to set proxy for smtpmail.el ?

[Dmitry Alexandrov]

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Robert Pluim <rpluim@gmail.com> wrote:
> SMTP via a proxy sounds like a bad idea: you give the proxy access to all your email.

Perhaps, it worth clarifying, that this is about SOCKS-proxies as they are currently supported by GNU Emacs.  Normally, SOCKS and TLS are _not_ mutually exclusive.

Actually, Google simply would not allow you to do a mistake of establishing unenciphered connection there, via proxy or not.

> Having said that, thereʼs a socks.el which contains 'socks-open-network-stream' that might work for you.

That is, it should not.

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Re: How to set proxy for smtpmail.el ?

[Dmitry Alexandrov]

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"numbchild@gmail.com" <numbchild@gmail.com> wrote:
> I'm unable to send email with smtpmail.el

What do you use then?  mstmp(1) or something alike?  What is the reason behind seeking a switch to smtpmail.el?

> I think it might be because of the internet censorship firewall in China.

This made me quite curious: why to choose a mail provider that is inaccessible without tricks?  There is a lot mail providers besides Google.

> So I decided to use a proxy for smtpmail. I have not found the smtpmail options for setting proxy.

IIRC, Emacs have a very rudimentary support of proxies.  Namely, there is no way to proxy a TLS stream, only a cleartext one.

In other words, there is really none.

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