B4X
Mailgun Send Send HTML Email with Attachments and HTML Images

Sends an HTML email with images and attachments.
Chilkat B4X Downloads

B4X
Dim success As Boolean = False

'  This example assumes the Chilkat API to have been previously unlocked.
'  See Global Unlock Sample for sample code.

Dim http As ChilkatHttp
http.Initialize("http")

http.Login = "api"
http.Password = "sending_api_key"'  Replace with your actual sending API key.

Dim req As ChilkatHttpRequest
req.Initialize
req.HttpVerb = "POST"
req.Path = "/v3/YOUR_DOMAIN_NAME/messages"
req.ContentType = "multipart/form-data"

'  Change YOUR_DOMAIN_NAME to something like "mg.your-domain.com".
req.AddParam("from", "Your Name <mailgun@YOUR_DOMAIN_NAME>")
req.AddParam("to", "Joe Example <joe@example.com>")
req.AddParam("subject", "Hello Joe Example")
req.AddParam("html", "<html><body><b>This is the HTML body</b><br><img src=" & Chr(34) & "cid:cidStarfish.jpg" & Chr(34) & "></body></html>")

'  An a attachd file
Dim bd As ChilkatBinData
bd.Initialize
success = bd.LoadFile("qa_data/hamlet.zip")
If success = False Then
    Log("Failed to load file attachment.")
    Return
End If

req.AddBdForUpload("attachment", "hamlet.zip", bd, "application/zip")

'  add an image as CID
success = bd.LoadFile("qa_data/jpg/starfish.jpg")
If success = False Then
    Log("Failed to load HTML image.")
    Return
End If

req.AddBdForUpload("inline", "cidStarfish.jpg", bd, "image/jpeg")

Dim resp As ChilkatHttpResponse
resp.Initialize
success = http.HttpSReq("api.mailgun.net", 443, True, req, resp)
If success = False Then
    Log(http.LastErrorText)
    Return
End If


Dim sbResponseBody As ChilkatStringBuilder
sbResponseBody.Initialize
resp.GetBodySb(sbResponseBody)
Dim jResp As ChilkatJsonObject
jResp.Initialize
jResp.LoadSb(sbResponseBody)
jResp.EmitCompact = False

Log("Response Body:")
Log(jResp.Emit)

Dim respStatusCode As Int = resp.StatusCode
Log("Response Status Code = " & respStatusCode)
If respStatusCode >= 400 Then
    Log("Response Header:")
    Log(resp.Header)
    Log("Failed.")
    Return
End If


'  Sample JSON response:
'  (Sample code for parsing the JSON response is shown below)

'  {
'    "id": "<20210429234809.1.2D550E1C94D3D98F@sandbox0e542e4c577f4bbb98c8bf6b6bca727b.mailgun.org>",
'    "message": "Queued. Thank you."
'  }

'  Sample code for parsing the JSON response...
'  Use the following online tool to generate parsing code from sample JSON:
'  Generate Parsing Code from JSON

Dim id As String = jResp.StringOf("id")
Dim message As String = jResp.StringOf("message")