How to send an HTML email to a non-programmer?

Question

PHP

Hello.
tell me, maybe there is some software to send html letters to a simple user, not a programmer?
There is a task to send beautiful email letters to certain addresses.
How to make them up, I roughly understand (table, inline-css), but how to send it?
Through php on some feedback form, I do this, I just store the template in php, substitute the data and send it with the mail () function.
But how to do it for a non-programmer, who, for example, has only an html file of a letter and does not have a send address, so that he can select an html file and click send and that's it ...
Thank you in advance for your help!

Answer 1

MailChimp and analogues. Actually, search for "Service for sending email"

Answer 2

any mailing service
the same unisender

Answer 3

The mail() function in PHP sends HTML emails just fine*.
You just need to add a header ("content-type: text/html; charset=UTF-8").
Here is an example call: $res = @mail($email, $subject, $message, "FROM:" . $from_email . "\nREPLY-TO:" . $reply_to_email . "\ncontent-type: text/html; charset= UTF-8");
In $message you will have the HTML code of the email. This is a poor man's option - your script will require minimal changes.
But the "big guys" do things differently. They send i.e. multipart letter, where there is both a text and an HTML version. The code for sending it is a little more difficult to write (I have almost 20 lines).
But the already written classes will help here, monstrous in size and inconvenience (compared to a simple call to mail (),
* - there may be problems with encodings (including subject encoding, because there is a separate encoding algorithm for this) in certain mail clients, such as Lotus Notes.