I was thinking about a cli tool, involving sending emails through smtp because its purpose.
I was very happy finding out that Mozilla with the ISPDB offered a large list of configuration parameteres for various email provider, but I noticed that its not updated.
Any tips is welcomed

Mailgun and Sendgrid both have excellent APIs for SMTP. Takes all the guess work out.

Python does a decent job for this.

@bahua i'm giving a look but I don't think is what I need. Btw thanks

... sendmail?

Sorry guys I misexplained

What I'm looking for is a way to get provider SMTP config parameters allowimg the user to use his email address. So a part of this tool is a smtp client without bothering him asking smtp params. I'll try with ISPDB

Well, mailx will do that, if you configure it properly. But running a local SMTP daemon, unless you're versed in the always-changing world of SMTP vulnerabilities, is an absolute nightmare. The SMTP daemon you install and configure can be set up to use a remote SMTP server, but you will still need it.