B4A Library New Net library - Android FTP, SMTP and POP3

Erel · Aug 17, 2011

The Net library supports FTP, SMTP and POP3 protocols. This library replaces the FTP library. Both regular connections and SSL connections are supported.
SMTP - Allows to directly connect to SMTP mail servers and send mails, including Html messages and attachments.
POP3 - Allows to directly connect to POP3 mail servers and download messages. Currently the messages are not parsed. The raw string is returned. You can use MailParser class to parse the raw messages.

Installation instructions:
- Download the attach file.
- Copy Net.xml and Net.jar to the additional libraries folder. Make sure that there are no older copies in the internal libraries folder.

V1.81 - latest version
V1.80 - SMTP, POP and FTP can be configured to use a custom trust manager. This allows accepting invalid certificates.

V1.77 - New Sender.MailFrom field. Allows setting the mail address that is sent with the MAIL command. By default it is the same as the Username field.

V1.75 - Adds a configurable timeout parameter - FTP.TimeoutMs. Default timeout is set to 60000 (60 seconds).

V1.70 - Adds support for calling with Wait For: https://www.b4x.com/android/forum/threads/b4x-net-library-ftp-smtp-pop-with-wait-for.84821/
SMTP.AdditionalHeaders map. Allows adding headers to the messages.

V1.63 - Fixes an issue with SMTP mails with attachments. The closing boundary was previously missing.
V1.62 - Fixes an issue with SMTP in StartTLS mode.
V1.61 - Fixes an issue in SMTP related to the content encoding not being set in multipart messages.

V1.60 - New method: FTP.AppendFile. Similar to UploadFile. Appends the data to an existing file if such exists. It sends the APPE FTP command.

V1.53 - Fixes an issue with FTP.CloseNow and SSL connections.

V1.52 - Adds support for different types of authentication methods (SMTP): http://www.b4x.com/android/forum/th...d-ftp-smtp-and-pop3.10892/page-11#post-232432

V1.51 is released. Fixes an issue with FTP over SSL explicit mode.

V1.50 is released. See this link: http://www.b4x.com/android/forum/th...d-ftp-smtp-and-pop3.10892/page-10#post-231145

V1.37 is released. This version removes the automatic escaping of '=' characters in SMTP messages. To implement it in your code you should write:

B4X:

SMTP.Body = SMTP.Body.Replace("=", "=3D")

V1.35 is released. This version adds support for STARTTLS mode.
Unlike UseSSL mode the connection is "upgraded" to a secured connection only after the client sends the STARTTLS command.
Most of the popular smtp servers support this mode, usually on port 587.

B4X:

Sub Activity_Create(FirstTime As Boolean)
   If FirstTime Then
      smtpClient.Initialize("smtp.gmail.com", 587, "xxx@gmail.com", "yyy", "SmtpClient")
      smtpClient.StartTLSMode = True
   End If
End Sub

AscySoft · Mar 6, 2013

Erel said:
This is the only change you need to do in the client. The port is passed in the Initialize method.

Hi, thanks for confirming that I am so negligent. Well, I'm glad this happened.

MotoMusher · Apr 5, 2013

This library is great. I have a question on SMTP content-type.

I believe attachments are being sent as application/octet-stream. It works fine, but one of the services that users are using wants image/jpeg and it is discarding octet-stream messages.

Any ideas how to get around it? SMTP message in my case is always just a post of an image taken with the camera I wrote.

Erel · Apr 6, 2013

It is currently not possible to change the content type of attachments.

rboeck · Apr 11, 2013

GermanUmlaute with SMTP library

i found out, that 'umlaute' in smtp1.sender are not handled correct, but umlaute in body and subject works without any problems.

The sender name should be: Böck, but the receiver gets: BÃ¶ck

Any tipps to convert this string?

Greetings
Reinhard

Erel · Apr 12, 2013

Are you setting it do a non-email address value?

rboeck · Apr 12, 2013

Yes; i want to send with my real name;here is the code:

B4X:

SMTP1.Sender = Main.Setup.Get("Name")  'real name with umlaute..
SMTP1.To.Add(EditText5.Text)                   ' email adress

Greetings and thanks for your help!
Reinhard

Erel · Apr 12, 2013

Please try the attached updated library.

rboeck · Apr 12, 2013

Hi Erel,

i never used such a futuristic library, which date is in the future!

Back to my problem: In Outlook can see now the 'Umlaute', but it is not the usual style:

This is the line on top of the message:
Reinhard Böck <=?UTF-8?Q?Reinhard_B=C3=B6ck?=>

A message sent to myself look like:
Reinhard Böck <reinhard.boeck@gmail.com>

On the tablet i see the incoming mail and in the short preview i see only ""< for a short time. Inside gmail on handy and tablet now i see everything correct.
Maybe ic could convert the sender field and replace the umlaute with something ...

Many thanks for your work!
Reinhard

MotoMusher · Apr 30, 2013

Has anyone else gotten this to work with Hotmail or me.com over SMTP?

Gmail users and others are fine, myself included. My hotmail users and me.com are having problems.

I signed up for a hotmail.com account to test and get the following error.

SendTestEmail-javax.net.ssl.SSLProtocolException: SSL handshake aborted: ssl=0x140f1a0: Failure in SSL library, usually a protocol error
error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol (external/openssl/ssl/s23_clnt.c:683 0x40193cf5:0x00000000)

Setup is xxx@hotmail.com
smtp.live.com
ssl enabled
port 587

I was not trapping the me.com (icloud.com) errors in the current release and don't have an account to check there.

In a little research it appears that "starttls" may be different than SSL/TLS? I don't know enough to comment. Issue 20175 - android - Mail setup issues - Android - An Open Handset Alliance Project - Google Project Hosting

Any help is appreciated.

Erel · Apr 30, 2013

Are you able to connect to this provider with the default mail app?

MotoMusher · Apr 30, 2013

It does pass the validation step for incoming and outgoing mail in the android app with the letter and @ wax seal logo. It also sends and receives email. The app has choices for both SSL and TLS and it is picking TLS on the autosetup not SSL.

Most cases where users have a failure in my app the provider specifies TLS.

My app still fails with same setup.

Erel · Apr 30, 2013

A good explanation of the various protocols: https://www.fastmail.fm/help/technology_ssl_vs_tls_starttls.html

My guess is that this server requires STARTTLS which is currently not supported. I will add it in the future.

MotoMusher · Apr 30, 2013

That would be great. Thank you Erel.

That last paragraph in the link makes sense. Seems odd that Microsoft and Apple both are still using 587.

mc73 · May 21, 2013

Seems to me that TLS is not supported for now. Is there a chance this may change soon? Yahoo servers strictly use TLS since some time and I have to change my app accordingly.

GMan · Jul 8, 2013

Hi Erel,
i always got an error in the log when sending an email:

B4X:

false
java.net.UnknownHostException: smtp.gmail.com

all parameters are correct, the email soft(outlook) connects well and works fine.

I will send a body with some contents of some EditText's like this:

B4X:

SMTP.Body = Name.Text & CRLF & Surname.Text & CRLF

Any suggestions for this ?

Erel · Jul 8, 2013

Can you post the code (without the user name and password)?

Are you testing it with a real device? Are you sure that the device is connected to the internet?

MotoMusher · Jul 8, 2013

GMan Your problem may be with enable ssl, or the port. Port should be 465 with UseSSL true

Here's my code that works fine with this library with the exception of providers requiring StartTLS (yahoo.com, me.com, outlook.com, live.com etc)

B4X:

Dim SMTP As SMTP
Dim MyFilePath As String
Dim DirName As String = "Something"
MyFilePath = File.DirRootExternal & "/" & DirName & "/SomethingElse/"
SMTP.Initialize(MyAuth.CamSMTPServer, MyAuth.CamPort, MyAuth.CamMyEmail, MyAuth.CamMyPass, "SMTP")
SMTP.UseSSL = MyAuth.CamSSL 'True 'Gmail requires SSL.
SMTP.To.Add("myemail@gmail.com")
SMTP.To.Add(MyAuth.CamMyEmail)
SMTP.Subject = "TestMessage"
SMTP.HtmlBody = False
SMTP.AddAttachment(File.DirAssets, Main.Graphic)   
SMTP.Send

Also, you may want to make use of .trim (surname.text.trim). Sooner or later it will bite you if you don't. This is especially true for when setting port numbers, and email addresses, and smtp servers and passwords...

GMan · Jul 8, 2013

Thx Erel,

just solved the "problem"
was sitting outside with my notebook and it lost connection (i tested this time with the Virtual Device), so email couldn't work.

So, everything is fine - but finest of all is your lib :sign0188:

Erel · Jul 9, 2013

STARTTLS mode is now supported. See first post.

sktanmoy · Jul 9, 2013

Starttls

I failed to understand how to use STARTTLS after reading first post? smtp.StartTLSMode = ture will work? Or anything else?

B4A Library New Net library - Android FTP, SMTP and POP3

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