[Lazarus] Email sending program using Indy stopped working - seems to be an SSL problem

[Michael Van Canneyt]

On Sat, 13 Jan 2024, Bo Berglund via lazarus wrote:

>>
>> Indy 10 uses a completely outdated version of the SSL library, which does
>> not have the most recent cryptographic routines (notably for tls).
>>
>> Most likely the server was updated and now rejects this old version.
>
> It looks likely. I will check with the ISP tech support on Monday (this company
> closes support on week-ends)..
>
>> There is of course a new version of the openssl library (3.2.x).
>> The interface of that library changed, but to the best of my knowledge,
>> indy does not support it.
>
> Then I have to switch to my backup plan, which is to do the mailing itself from
> a php script on my webserver (hosted at the same ISP server as the mail server
> is running on).

You could also use Synapse. I always prefer synapse over Indy.

>
> Then I have to modify the mailer program so it posts the data to that php
> handler instead of using the SMTP Indy component to do the job.

Or you use the system installed mailer. That's what I do.
I write the mail to file and invoke sendmail.

No hassle with TLS, failed connections and whatnot. 
sendmail will do what it takes, even retry in case of temporary failure.

Michael.