SMTP send error

jpvniekerk

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I frequently get this LastException message when sending an email with SMTP.Send.

org.apache.commons.net.smtp.SMTPConnectionClosedException:
Connection closed without indication.
Click to expand...

It happens frequently when I use the data connection, and very seldom when connected via WiFi.

What would cause this error?
Is there anything I can do to prevent this from happening?

Thanks for any help
 
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jpvniekerk

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Erel,

There are no attachments - only one line in the body to test.

I have tried and retried multiple times. No luck. I can send an email from my email program on the phone just fine with the same connection. When the phone is connected to my WiFi it sends 100%.

I use port 587 (can't remember where I got this from!). I tried with 465, but then I get a different error - even through WiFi. Should I try a different port?

The problem occurs in a big program. I am making up a simulated program (using exactly the same steps for the email portion of the big program, and will put that here when I'm done.
 
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jpvniekerk

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I think the problem lies with my email host.

I tried to send the emails from a gmail account - so far had 100% success connected to my WiFi and 100% success using data connection (cell).

I have contacted my host, but they don't seem to know what's going on either
 
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A

abner69

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One other thing you might want to check on is see if your isp requires any type of smtp authentication to access the server..

...Pablo
 
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jpvniekerk

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Latest from my host is :
port 26
server requires authentication

For the latter do I just use SMTP1.UseSSL = True? I can't find anything else about authentication.
 
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jpvniekerk

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Nope - that didn't work either

With UseSSL = True I got an authentication error (or something like that)
With UseSSL = False I got the same error as in the first post when connected via data. Connected via WiFi worked (as per original post).
 
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