B4X

SMTP using HTTP Proxy

Demonstrates how to communicate with an SMTP server via an HTTP proxy. B4X

Dim success As Boolean = False

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

'  The mailman object is used for sending and receiving email.
Dim mailman As ChilkatMailMan
mailman.Initialize("mailman")

'  To connect through an HTTP proxy, set the HttpProxyHostname
'  and HttpProxyPort properties to the hostname (or IP address)
'  and port of the HTTP proxy.  Typical port numbers used by
'  HTTP proxy servers are 3128 and 8080.
mailman.HttpProxyHostname = "www.my-http-proxy.com"
mailman.HttpProxyPort = 3128

'  Important:  Your HTTP proxy server must allow non-HTTP
'  traffic to pass.  Otherwise this does not work.

'  Set the SMTP server.
mailman.SmtpHost = "smtp.chilkatsoft.com"

'  Set the SMTP login/password (if required)
mailman.SmtpUsername = "myUsername"
mailman.SmtpPassword = "myPassword"

'  Create a new email object
Dim email As ChilkatEmail
email.Initialize

email.Subject = "This is a test"
email.Body = "This is a test"
email.From = "Chilkat Support <support@chilkatsoft.com>"
success = email.AddTo("Chilkat Admin", "admin@chilkatsoft.com")

'  Call SendEmail to connect to the SMTP server via the HTTP proxy and send.
'  The connection (i.e. session) to the SMTP server remains
'  open so that subsequent SendEmail calls may use the
'  same connection.  
success = mailman.SendEmail(email)
If success <> True Then
    Log(mailman.LastErrorText)
    Return
End If


'  Some SMTP servers do not actually send the email until 
'  the connection is closed.  In these cases, it is necessary to
'  call CloseSmtpConnection for the mail to be  sent.  
'  Most SMTP servers send the email immediately, and it is 
'  not required to close the connection.  We'll close it here
'  for the example:
success = mailman.CloseSmtpConnection
If success <> True Then
    Log("Connection to SMTP server not closed cleanly.")
End If


Log("Mail Sent!")