for SMS You can User template https://s.dynode.in/UploadedFiles/Utility/Bulk%20SMS.pdf

and API form  https://dynodesoft.org/pmswebservice.asmx?op=SendSMSLic
api minmum data https://s.dynode.in/UploadedFiles/Utility/SmsApiMinmumInfo.png

code 
// javascript

<script>
function sendSMS() {
    const params = new URLSearchParams({
        licno: "LIC123",
        mob: "9876543210",
        smstext: "Test SMS from PMS",
        smsfrom: "WEB",
        fromComp: "Dynode",
        operatorname: "ADMIN",
        sendername: "DYNSMS",
        smstype: "Transactional",
        Entityid: "ENTITY123",
        TemplateId: "TEMP123",
        username: "apiuser",
        apikey: "apikey123"
    });

    fetch("https://dynodesoft.org/pmswebservice.asmx/SendSMSLic?" + params)
        .then(res => res.text())
        .then(data => console.log("SMS Response:", data))
        .catch(err => console.error(err));
}
</script>

<button onclick="sendSMS()">Send SMS</button>


// c#

using System.Net.Http;
using System.Threading.Tasks;
using System.Collections.Generic;

public async Task<string> SendSmsAsync()
{
    using var client = new HttpClient();

    var data = new Dictionary<string, string>
    {
        { "licno", "LIC123" },
        { "mob", "9876543210" },
        { "smstext", "Test SMS from PMS" },
        { "smsfrom", "WEB" },
        { "fromComp", "Dynode" },
        { "operatorname", "ADMIN" },
        { "sendername", "DYNSMS" },
        { "smstype", "Transactional" },
        { "Entityid", "ENTITY123" },
        { "TemplateId", "TEMP123" },
        { "username", "apiuser" },
        { "apikey", "apikey123" }
    };

    var response = await client.PostAsync(
        "https://dynodesoft.org/pmswebservice.asmx/SendSMSLic",
        new FormUrlEncodedContent(data)
    );

    return await response.Content.ReadAsStringAsync();
}






// 1. In HTML Form 




<h2>Send Mail</h2>

<form action="https://Custommail.dynode.in/api/mail/sendmail" method="post" enctype="multipart/form-data">
    <div>
        <label for="licno">License Number:</label>
        <input type="text" id="licno" name="licno" required />
    </div>
    <div>
        <label for="email">Email (Optional):</label>
        <input type="email" id="email" name="email" />
    </div>
    <div>
        <label for="Subject">Subject:</label>
        <input type="text" id="Subject" name="Subject" required />
    </div>
    <div>
        <label for="Content">Content:</label>
        <textarea id="Content" name="Content" required></textarea>
    </div>
    <div>
        <label for="Files">Attachments:</label>
        <input type="file" id="Files" name="Files" multiple />
    </div>
    <div>
        <input type="submit" value="Send" />
    </div>
</form>





// 2. In C#


using System;
using System.Collections.Generic;
using System.IO;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Threading.Tasks;

public class EmailSender
{
    private static readonly HttpClient client = new HttpClient();

    public async Task<bool> SendEmailAsync(string licno, string email, string subject, string content, List<string> filePaths)
    {
        try
        {
            using (var formData = new MultipartFormDataContent())
            {
                // Add form data
                formData.Add(new StringContent(licno), "licno");
                formData.Add(new StringContent(email), "email");
                formData.Add(new StringContent(subject), "Subject");
                formData.Add(new StringContent(content), "Content");

                // Add files
                foreach (var filePath in filePaths)
                {
                    var fileStream = File.OpenRead(filePath);
                    var fileContent = new StreamContent(fileStream);
                    fileContent.Headers.ContentDisposition = new ContentDispositionHeaderValue("form-data")
                    {
                        Name = "Files",
                        FileName = Path.GetFileName(filePath)
                    };
                    formData.Add(fileContent);
                }

                // Make the HTTP POST request
                var response = await client.PostAsync("https://Custommail.dynode.in/api/mail/sendmail", formData);

                // Check the response
                if (response.IsSuccessStatusCode)
                {
                    return true;
                }
                else
                {
                    var responseContent = await response.Content.ReadAsStringAsync();
                    Console.WriteLine($"Error: {responseContent}");
                    return false;
                }
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine($"Exception: {ex.Message}");
            return false;
        }
    }
}



//Usage
//You can use this function from anywhere in your application to send an email. Here’s an example of how to call it:


public class Program
{
    public static async Task Main(string[] args)
    {
        var emailSender = new EmailSender();

        string licno = "your_license_number";
        string email = "recipient@example.com";
        string subject = "Your Subject";
        string content = "Email body content";
        List<string> filePaths = new List<string>
        {
            @"C:\path\to\your\file1.txt",
            @"C:\path\to\your\file2.txt"
        };

        bool isSuccess = await emailSender.SendEmailAsync(licno, email, subject, content, filePaths);

        if (isSuccess)
        {
            Console.WriteLine("Email sent successfully.");
        }
        else
        {
            Console.WriteLine("Failed to send email.");
        }
    }
}




//JavaScript (Fetch API)
//Here's a function using the Fetch API:


async function sendEmail(licno, email, subject, content, files) {
    try {
        let formData = new FormData();
        formData.append('licno', licno);
        formData.append('email', email);
        formData.append('Subject', subject);
        formData.append('Content', content);

        for (let i = 0; i < files.length; i++) {
            formData.append('Files', files[i], files[i].name);
        }

        let response = await fetch('https://Custommail.dynode.in/api/mail/sendmail', {
            method: 'POST',
            body: formData
        });

        if (response.ok) {
            let responseData = await response.json();
            console.log('Email sent successfully:', responseData);
            return true;
        } else {
            let errorData = await response.text();
            console.error('Failed to send email:', errorData);
            return false;
        }
    } catch (error) {
        console.error('Error:', error);
        return false;
    }
}

//jQuery
//Here's a function using jQuery:


function sendEmail(licno, email, subject, content, files) {
    var formData = new FormData();
    formData.append('licno', licno);
    formData.append('email', email);
    formData.append('Subject', subject);
    formData.append('Content', content);

    for (var i = 0; i < files.length; i++) {
        formData.append('Files', files[i], files[i].name);
    }

    $.ajax({
        url: 'https://Custommail.dynode.in/api/mail/sendmail',
        type: 'POST',
        data: formData,
        processData: false,
        contentType: false,
        success: function (response) {
            console.log('Email sent successfully:', response);
            return true;
        },
        error: function (jqXHR, textStatus, errorThrown) {
            console.error('Failed to send email:', textStatus, errorThrown);
            return false;
        }
    });
}

JavaScript (Fetch API) Usage


<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Send Email</title>
</head>
<body>
    <form id="emailForm">
        <input type="text" id="licno" name="licno" placeholder="License Number" required>
        <input type="email" id="email" name="email" placeholder="Email (Optional)">
        <input type="text" id="subject" name="subject" placeholder="Subject" required>
        <textarea id="content" name="content" placeholder="Content" required></textarea>
        <input type="file" id="files" name="files" multiple>
        <button type="submit">Send Email</button>
    </form>

    <script>
        document.getElementById('emailForm').addEventListener('submit', async function (event) {
            event.preventDefault();

            let licno = document.getElementById('licno').value;
            let email = document.getElementById('email').value;
            let subject = document.getElementById('subject').value;
            let content = document.getElementById('content').value;
            let files = document.getElementById('files').files;

            let success = await sendEmail(licno, email, subject, content, files);

            if (success) {
                alert('Email sent successfully.');
            } else {
                alert('Failed to send email.');
            }
        });
    </script>
</body>
</html>


//jQuery Usage

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Send Email</title>
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
</head>
<body>
    <form id="emailForm">
        <input type="text" id="licno" name="licno" placeholder="License Number" required>
        <input type="email" id="email" name="email" placeholder="Email (Optional)">
        <input type="text" id="subject" name="subject" placeholder="Subject" required>
        <textarea id="content" name="content" placeholder="Content" required></textarea>
        <input type="file" id="files" name="files" multiple>
        <button type="submit">Send Email</button>
    </form>

    <script>
        $('#emailForm').submit(function (event) {
            event.preventDefault();

            var licno = $('#licno').val();
            var email = $('#email').val();
            var subject = $('#subject').val();
            var content = $('#content').val();
            var files = $('#files')[0].files;

            var success = sendEmail(licno, email, subject, content, files);

            if (success) {
                alert('Email sent successfully.');
            } else {
                alert('Failed to send email.');
            }
        });
    </script>
</body>
</html>