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The Bat Gmail error: SessionUnknownContentType ct (50)
 
#1
0  
Using The Bat 3.98.1 with Gmail, upon sending any e-mail, the following error is reported. NOTE: The email is always sent sucessfully, but this error is still reported:

TLS Protocol error: Unexpected message SessionUnknownContentType ct (50)

The settings I am using are:

smtp.gmail.com
Secure to Regular port (STARTTLS) Port 587

Perform SMTP Authenticaion: YES, using same username ans password as for mail retreval.

Require secure authentication: NO

Use POP before SMTP authentication: NO

Any ideas on why this error is reported?

Cheers
Joe
 
 
 
#2
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Hello,

I am using version 3.99.03 and have the same problem. Would anyone know what to do about it?

--
Lubos  
 
 
 
#3
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I get the same.
After sending a message TB sends a 'QUIT' command to the server to signal the end of the SMTP session.
TB expects a '221' signal from the server and gmail doesn't send that.
Hence the error.
__________________________________
I'm just a user of The Bat! I don't work for Ritlabs.
 
 
 
#4
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Quote
Roelof Otten writes:
I get the same.
After sending a message TB sends a 'QUIT' command to the server to signal the end of the SMTP session.
TB expects a '221' signal from the server and gmail doesn't send that.
Hence the error.

Forgive my poor Englisch ;-)
I've got the same problem, the mail is send normaly, so is it possible to turn off that 221 request from TB?

Greats Henk
 
 
 
#5
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No.
The problem is on the gmail side for not following the smtp protocol. The end of the smtp session needs to be negotiated properly according to the specs.
__________________________________
I'm just a user of The Bat! I don't work for Ritlabs.
 
 
 
#6
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If this problem still reproducible at your side?
 
 
 
#7
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I am afraid it is still reproducible. :-(
 
 
 
#8
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I'm getting the same thing too

Quote

!8/19/2007, 19:07:17: SEND  - TLS protocol error: Unexpected message SessionUnknownContentType ct (50).
 
 
 
#9
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Is there really nothing we can do about it? Is it a bug of Gmail or The Bat? I haven't got any response from Gmail and the Gmail Groups conferences also haven't found any solution yet...

Lubos
 
 
 
#10
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Now that Maxim (one of the developers) knows about it, we can only hope that it's going to be fixed.
__________________________________
I'm just a user of The Bat! I don't work for Ritlabs.
 
 
 
#11
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I think they should just check for the 221 condition and if they don't get it _and_ the server is gmail, just ignore it.

I have several emails in my gmail folder and I get the error message but the message is still in my Outbox. So I have no clue if it was sent our not.

This is really annoying and needs to be worked around because since I've only seen this problem on The Bat!, I don't think other email (Eudora, TB, MS Live Mail!, Pocomail) programs I've used with GMail (and which don't have this problem) don't have this problem at all.  
 
 
 
#12
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I don't get any error with Gmail using port 465 and "secure to dedicated port."
 
 
 
#13
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Hi,

last weekend I noticed that this error message disappeared. Gmail seems to have made a correction.

Lubos
 
 
 
#14
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I have same error while testing my SMTP-server based on exim. Using The Bat! 4.0.34:
The logs of The Bat!:
TLS Protocol error: Unexpected message SessionUnknownContentType ct (53)
The logs of exim:
SMTP protocol synchronization error (input sent without waiting for greeting): rejected connection from H=[MY-IP-ADDRESS] input="\026\003\001"

During testing, I discovered that I get the same error when connecting to same port with telnet and send any command before getting the greeting form server:
"220 MY-HOST-NAME ESMTP Exim 4.69 CURRENT-DATE-AND-TIME"

So, it seems, The Bat! should wait for a greeting (while exim makes a dns-requests). In fact, The Bat! do waits, but no longer than 5 or 6 seconds, and after that sends a command
Edited: Feathered Frog - 09 February 2009 13:54:38
 
 
 
#15
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Same problem in October, 2025. Switching to 465 port helps
Edited: Alex - 24 October 2025 00:05:04
 
 
 
#16
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Quote
Alex wrote:
Same problem in October, 2025. Switching to 465 port helps
I configured GMail on TB for the first time a year or two ago. IMAP, OAUTH, and from what I remember ports were configured automatically. I'm having no problems whatsoever. Port 465 is used, so that's the way to go.
 
 
 
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