PowerBuilder
Mailgun Send Email using MIME

Send an email using MIME. This allows for the Chilkat email object to be used to construct the email. Then it can be sent using Mailgun.
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integer li_rc
integer li_Success
oleobject loo_Email
string ls_ContentType
string ls_Html
oleobject loo_Http
oleobject loo_Req
oleobject loo_Resp
oleobject loo_SbResponseBody
oleobject loo_JResp
integer li_RespStatusCode
string ls_Id
string ls_Message

li_Success = 0

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

// We're going to create an email that contains an .zip attachment,
// and also both plain-text and HTML alternative bodies.
// The HTML body will include an image.

loo_Email = create oleobject
li_rc = loo_Email.ConnectToNewObject("Chilkat.Email")
if li_rc < 0 then
    destroy loo_Email
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// Adding attachments, HTML/plain-text bodies, etc can be done
// in any order:

// Add an attachment
ls_ContentType = loo_Email.AddFileAttachment("qa_data/hamlet.zip")
if loo_Email.LastMethodSuccess = 0 then
    Write-Debug loo_Email.LastErrorText
    destroy loo_Email
    return
end if

// Add some headers:
loo_Email.Subject = "This is a complex email"
// Please change this email address before testing.
li_Success = loo_Email.AddTo("Joe Example","joe@example.com")
loo_Email.From = "Your Name <mailgun@YOUR_DOMAIN_NAME>"

// Add a plain-text body:
loo_Email.AddPlainTextAlternativeBody("This is the plain-text body")

// Add an image that will be embedded in the HTML body.
li_Success = loo_Email.AddRelatedFile2("qa_data/jpg/starfish.jpg","starfish.jpg")
if li_Success = 0 then
    Write-Debug loo_Email.LastErrorText
    destroy loo_Email
    return
end if

// Add an HTML body:

ls_Html = "<html><body><b>This is the HTML body</b><br><img src=~"starfish.jpg~"></body></html>"

loo_Email.AddHtmlAlternativeBody(ls_Html)

// ------------------------------------------------------------------------
// Send the above email using Mailgun

loo_Http = create oleobject
li_rc = loo_Http.ConnectToNewObject("Chilkat.Http")

// Implements the following CURL command:

loo_Http.Login = "api"
loo_Http.Password = "sending_api_key"//  Replace with your actual sending API key.

loo_Req = create oleobject
li_rc = loo_Req.ConnectToNewObject("Chilkat.HttpRequest")

loo_Req.HttpVerb = "POST"
loo_Req.Path = "/v3/YOUR_DOMAIN_NAME/messages.mime"
loo_Req.ContentType = "multipart/form-data"

loo_Req.AddParam("from","Your Name <mailgun@YOUR_DOMAIN_NAME>")
loo_Req.AddParam("to","Joe Example <joe@example.com>")
loo_Req.AddStringForUpload2("message","message.eml",loo_Email.GetMime(),"utf-8","application/octet-stream")

loo_Resp = create oleobject
li_rc = loo_Resp.ConnectToNewObject("Chilkat.HttpResponse")

li_Success = loo_Http.HttpSReq("api.mailgun.net",443,1,loo_Req,loo_Resp)
if li_Success = 0 then
    Write-Debug loo_Http.LastErrorText
    destroy loo_Email
    destroy loo_Http
    destroy loo_Req
    destroy loo_Resp
    return
end if

loo_SbResponseBody = create oleobject
li_rc = loo_SbResponseBody.ConnectToNewObject("Chilkat.StringBuilder")

loo_Resp.GetBodySb(loo_SbResponseBody)
loo_JResp = create oleobject
li_rc = loo_JResp.ConnectToNewObject("Chilkat.JsonObject")

loo_JResp.LoadSb(loo_SbResponseBody)
loo_JResp.EmitCompact = 0

Write-Debug "Response Body:"
Write-Debug loo_JResp.Emit()

li_RespStatusCode = loo_Resp.StatusCode
Write-Debug "Response Status Code = " + string(li_RespStatusCode)
if li_RespStatusCode >= 400 then
    Write-Debug "Response Header:"
    Write-Debug loo_Resp.Header
    Write-Debug "Failed."
    destroy loo_Email
    destroy loo_Http
    destroy loo_Req
    destroy loo_Resp
    destroy loo_SbResponseBody
    destroy loo_JResp
    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

ls_Id = loo_JResp.StringOf("id")
ls_Message = loo_JResp.StringOf("message")


destroy loo_Email
destroy loo_Http
destroy loo_Req
destroy loo_Resp
destroy loo_SbResponseBody
destroy loo_JResp