Send Emails from Siebel or Pulling Emails from Exchange Server using Internet SMTP/POP3 Server Driver with SSL/TLS fails.
Last updated on JANUARY 30, 2017
Applies to:Siebel Email Response - Version 22.214.171.124 SIA  to 15.18 [IP2015] [Release V8 to V15]
Information in this document applies to any platform.
Customer was trying to send email from Siebel using F9 with Internet SMTP/POP3 Server using SMTP with SSL protocol for a security connection.
The Email Server is Microsoft Exchange 2007 and customer was using a 2048-bit RSA keys to 112-bit symmetric keys. Siebel standard configuration support only 56 bit keys.
So customer has deployed Siebel Strong Security Encryption Pack (SSEP), but even after that customer could see the following error in the Internet SMTP/POP3 Server driver log files:
POP3SMTP[10/01/2012 13:59:19]:DBG:SMTP S: STARTTLS
POP3SMTP[10/01/2012 13:59:24]:DBG:SMTP R: 500 5.3.3 Unrecognized command
So based on this error the Exchange 2007 was not accepting the STARTTLS SMTP command sent by Siebel to negotiate a security connection. Exchange Server was not using TLS but regular SSL for SMTP, but it was clarified with customer that the STARTTLS SMTP command does not mean that TLS will be used, but is a regular SMTP comment to negotiate a security connection. More information about STARTTLS command can be found on Internet.
Customer reviewed Exchange Server configuration in order to make it accept the STARTTLS command.
But even after that the send emails failed with the following message:
POP3SMTP[10/03/2012 14:24:45]:DBG:SMTP S: STARTTLS
POP3SMTP[10/03/2012 14:24:45]:DBG:SMTP R: 220 2.0.0 SMTP server ready
POP3SMTP[10/03/2012 14:24:45]:DBG:SMTP S: EHLO ausodsvmr10
POP3SMTP[10/03/2012 14:24:45]:DBG:SMTP R: 454 4.7.0 Temporary authentication failure because negotiated Tls cipher strength is too weak.
The same behavior could be observed when using Internet SMTP/POP3 Server driver to pull emails from Exchange Server using Communications Inbound Receiver component.It fails to establish a POP3 session over SSL (not TLS) and following error can be observed:
In Internet SMTP/POP3 Server driver log files:
POP3SMTP[10/18/2013 15:48:43:726]:ERROR:Socket error 0: (null)
POP3SMTP[10/18/2013 15:48:43:726]:ERROR:Unable to connect to POP3 server xxxx.xxxxx.com on port 995
and in CommInboundRcvr log files:
GenericLog GenericError 1 0000045152610bb4:0 2013-10-18 15:48:43 (sissslimpl.inl (616) err=1181201 sys=0) SBL-NET-01553: Failed to establish SSL connection.
EMR_Log GenericError 1 0000045152610bb4:0 2013-10-18 15:48:43 Socket error 0: (null)
EMR_Log GenericError 1 0000045152610bb4:0 2013-10-18 15:48:43 Unable to connect to POP3 server xxxx.xxxxxxx.com on port 995
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