Visual FoxPro
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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LOCAL lnSuccess
LOCAL loEmail
LOCAL lcContentType
LOCAL lcHtml
LOCAL loHttp
LOCAL loReq
LOCAL loResp
LOCAL loSbResponseBody
LOCAL loJResp
LOCAL lnRespStatusCode
LOCAL lcId
LOCAL lcMessage

lnSuccess = 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.

loEmail = CreateObject('Chilkat.Email')

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

* Add an attachment
lcContentType = loEmail.AddFileAttachment("qa_data/hamlet.zip")
IF (loEmail.LastMethodSuccess = 0) THEN
    ? loEmail.LastErrorText
    RELEASE loEmail
    CANCEL
ENDIF

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

* Add a plain-text body:
loEmail.AddPlainTextAlternativeBody("This is the plain-text body")

* Add an image that will be embedded in the HTML body.
lnSuccess = loEmail.AddRelatedFile2("qa_data/jpg/starfish.jpg","starfish.jpg")
IF (lnSuccess = 0) THEN
    ? loEmail.LastErrorText
    RELEASE loEmail
    CANCEL
ENDIF

* Add an HTML body:

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

loEmail.AddHtmlAlternativeBody(lcHtml)

* ------------------------------------------------------------------------
* Send the above email using Mailgun

loHttp = CreateObject('Chilkat.Http')

* Implements the following CURL command:

loHttp.Login = "api"
loHttp.Password = "sending_api_key"*  Replace with your actual sending API key.

loReq = CreateObject('Chilkat.HttpRequest')
loReq.HttpVerb = "POST"
loReq.Path = "/v3/YOUR_DOMAIN_NAME/messages.mime"
loReq.ContentType = "multipart/form-data"

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

loResp = CreateObject('Chilkat.HttpResponse')
lnSuccess = loHttp.HttpSReq("api.mailgun.net",443,1,loReq,loResp)
IF (lnSuccess = 0) THEN
    ? loHttp.LastErrorText
    RELEASE loEmail
    RELEASE loHttp
    RELEASE loReq
    RELEASE loResp
    CANCEL
ENDIF

loSbResponseBody = CreateObject('Chilkat.StringBuilder')
loResp.GetBodySb(loSbResponseBody)
loJResp = CreateObject('Chilkat.JsonObject')
loJResp.LoadSb(loSbResponseBody)
loJResp.EmitCompact = 0

? "Response Body:"
? loJResp.Emit()

lnRespStatusCode = loResp.StatusCode
? "Response Status Code = " + STR(lnRespStatusCode)
IF (lnRespStatusCode >= 400) THEN
    ? "Response Header:"
    ? loResp.Header
    ? "Failed."
    RELEASE loEmail
    RELEASE loHttp
    RELEASE loReq
    RELEASE loResp
    RELEASE loSbResponseBody
    RELEASE loJResp
    CANCEL
ENDIF

* 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

lcId = loJResp.StringOf("id")
lcMessage = loJResp.StringOf("message")

RELEASE loEmail
RELEASE loHttp
RELEASE loReq
RELEASE loResp
RELEASE loSbResponseBody
RELEASE loJResp