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Subject: Re: Attempt to send email using AWS results in Socket closed by peer
From: Juan Rayas <juan.m.rayas@gmail.com>
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On Friday, September 3, 2021 at 1:59:33 AM UTC-7, Doctor Who wrote:
> On Fri, 3 Sep 2021 09:32:27 +0200, "Dmitry A. Kazakov"=20
> <mai...@dmitry-kazakov.de> wrote:=20
>=20
> >On 2021-09-03 00:19, Randy Brukardt wrote:=20
> >> "Dmitry A. Kazakov" <mai...@dmitry-kazakov.de> wrote in message=20
> >> news:sgol48$r20$1...@gioia.aioe.org...=20
> >> ...=20
> >>> Most mail servers do not accept unencrypted connections.=20
> >>=20
> >> That's news to me, as my mail server (you know, the one that runs=20
> >> Ada-Comment and the other ARG lists) doesn't support encrypted connect=
ions.=20
> >> I don't have any problem sending to GMail (I send copies of most of my=
=20
> >> personal mail there). Something else must be wrong.=20
> >=20
> >The question is with what settings. There are hundreds of combinations=
=20
> >of Port x unencrypted|StartTLS|TLS x authentication method.=20
> >=20
> >The port 465 was intended for TLS, then it was depreciated. Then they=20
> >introduced other ports. Legacy mail servers pissed that all on etc.=20
> >=20
> > From experience, getting a SMTP client working is real pain.
> he is better off using his own provider's mail server on port 25, it=20
> will accept username/password as authentication.
Hi all,

 thank you for your comments and responses.

I tried changing the port number to 25, using the default port number in th=
e SMTP.Client.Initialize procedure, and using other port numbers such as 58=
7. I even tried just initializing the SMT server and sending the email (wit=
hout authentication) as indicated in https://docs.adacore.com/aws-docs/aws/=
working_with_mails.html.

In all cases, I get the following error:

Can't send message :530 5.7.0 Must issue a STARTTLS command first. u7sm5705=
829pju.13 - gsmtp

The problem is I don't know how to send the STARTTLS command with AWS. Anyo=
ne know how?

My past experience was mostly with real-time embedded systems, so I don't h=
ave a lot of experience with email servers. I didn't expect this to be so d=
ifficult. Since this was mostly a toy to learn Ada, I may move on to other =
aspects of Ada for now.

Thanks for all your comments.
--Juan