Hi,

> On 22 Mar 2018, at 1:57 am, G.W.Gaich via use-livecode 
> <use-livecode@lists.runrev.com> wrote:
> 
> ....
> schannel: decrypted data buffer: offset 0 length 16384
> 501 Syntax error - line too long
> 

This gives us a clue.  It looks like your mail server is not detecting the line 
endings in the body of the e-mail.

Can you try add the following line just before the call to tsNetSmtpSync (line 
38) in the mouseUp handler of the “Send Email” button:

replace LF with CRLF in tPostData

And see if that makes any difference?

Regards,

Charles

> 
> 
>> Am 21.03.2018 um 09:34 schrieb Charles Warwick via use-livecode:
>> Can you please download the following stack:
>> 
>> https://downloads.techstrategies.com.au/tsnet/debug_liburl.livecode
>> 
>> Open it while you have your LCMail stack open, click the “start debug” 
>> button in the above stack, try send an e-mail with an attachment and then 
>> click “stop debug” to stop the timer in the debug field.
>> 
>> That should generate some debug information about your SMTP connection.  If 
>> you can post the results of that (minus any private details) it might help 
>> us to work out what is going on.
>> 
>> Regards,
>> 
>> Charles
>> 
>>> On 21 Mar 2018, at 5:24 am, G.W.Gaich via use-livecode 
>>> <use-livecode@lists.runrev.com> wrote:
>>> 
>>> Hello Charles,
>>> 
>>> thank you for your reply.
>>> 
>>> I have the same result if I disable the anti-virus software.
>>> 
>>> I testet it on another machine (windows 10). I get that error:
>>> 
>>> 
>>> tsneterr: (56) Failure when receiving data from the peer
>>> 
>>> My Mailserver:
>>> smtp.1und1.de
>>> Port is 587
>>> Authentification Method is password, normal
>>> Encryption is STARTTLS
>>> 
>>> 
>>> With Thunderbird I can send emails with attachments
>>> 
>>> Best
>>> Günter
>>> 
>>>> Am 19.03.2018 um 04:07 schrieb Charles Warwick via use-livecode:
>>>> Hi,
>>>> 
>>>> That does seem odd...  Is there any chance you might have some anti-virus 
>>>> software running that might be getting in the way?
>>>> 
>>>> Regards,
>>>> 
>>>> Charles
>>>> 
>>>>> On 14 Mar 2018, at 1:18 am, G. Wolfgang Gaich via use-livecode 
>>>>> <use-livecode@lists.runrev.com> wrote:
>>>>> 
>>>>> Hallo all,
>>>>> 
>>>>> try to send an email with attachment (PDF) from LiveCode with tsNet 
>>>>> (tsNetSmtpSync)
>>>>> 
>>>>> I tried the sample stack "Mail v1.2" from
>>>>> https://downloads.techstrategies.com.au/tsnet/LCMail.livecode
>>>>> 
>>>>> I get an error when I try to send with an attachment (PDF document):
>>>>> 
>>>>> Error tsneterr: (28) schannel: timed out sending data (bytes sent: 0)
>>>>> returned from server
>>>>> 
>>>>> 
>>>>> Without the attachment the email is send.
>>>>> 
>>>>> Windows 7, LC 8.1.9
>>>>> 
>>>>> 
>>>>> Any ideas?
>>>>> 
>>>>> Best
>>>>> Günter
>>>>> 
>>>>> 
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