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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: 530 5.7.0 Must issue a STARTTLS command first.
Date: Sun, 6 Jan 2019 10:19:53 +0100
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Date: 2019-01-06T10:19:53+01:00
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On 2019-01-06 05:54, Andrew Shvets wrote:
> I've looked through this group and taken the advice that was recommended in regards to sending e-mails using Ada and decided to try something very simple.  On RosettaCode, there is the following example:
> http://rosettacode.org/wiki/Send_email#Ada
> 
> When I run the code configured for my Gmail account (smtp.gmail.com and port being 587), I get the below error:
> 530 5.7.0 Must issue a STARTTLS command first. 126sm25673591qkj.70 - gsmtp
> 
> Why is that?

The mail server offered an encrypted session, the client confirms that 
with STARTTLS and then both continue on TLS. The client may also reject 
the offer, but it seems that the server's security level set to enforce TLS.

> And how can I send a STARTTLS command first?

Sorry, I don't use AWS.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de