Hi
We have 8 servers, 4 Mailbox, 2 Hub and 2 CAS, in the HUB, many emails began to queue, if I check the log, this is the result:
2013-07-03T20:50:19.288Z,Internet Exchange 2k7,08D0463778A04E9F,0,,189.204.46.68:25,*,,attempting to connect
2013-07-03T20:50:19.288Z,Internet Exchange 2k7,08D0463778A04E9F,1,10.237.48.5:55293,189.204.46.68:25,+,,
2013-07-03T20:50:19.491Z,Internet Exchange 2k7,08D0463778A04E9F,2,10.237.48.5:55293,189.204.46.68:25,<,220 webmail.semar.com.mx ESMTP Service ready,
2013-07-03T20:50:19.491Z,Internet Exchange 2k7,08D0463778A04E9F,3,10.237.48.5:55293,189.204.46.68:25,>,EHLO smtp.dom-orig.com.mx,
2013-07-03T20:50:19.522Z,Internet Exchange 2k7,08D0463778A04E9F,4,10.237.48.5:55293,189.204.46.68:25,<,"250-Requested mail action okay, completed",
2013-07-03T20:50:19.522Z,Internet Exchange 2k7,08D0463778A04E9F,5,10.237.48.5:55293,189.204.46.68:25,<,250-SIZE 20000000,
2013-07-03T20:50:19.522Z,Internet Exchange 2k7,08D0463778A04E9F,6,10.237.48.5:55293,189.204.46.68:25,<,250-AUTH PLAIN LOGIN,
2013-07-03T20:50:19.522Z,Internet Exchange 2k7,08D0463778A04E9F,7,10.237.48.5:55293,189.204.46.68:25,<,250-AUTH PLAIN LOGIN,
2013-07-03T20:50:19.522Z,Internet Exchange 2k7,08D0463778A04E9F,8,10.237.48.5:55293,189.204.46.68:25,<,250-8BITMIME,
2013-07-03T20:50:19.522Z,Internet Exchange 2k7,08D0463778A04E9F,9,10.237.48.5:55293,189.204.46.68:25,<,250 STARTTLS,
2013-07-03T20:50:19.522Z,Internet Exchange 2k7,08D0463778A04E9F,10,10.237.48.5:55293,189.204.46.68:25,>,STARTTLS,
2013-07-03T20:50:19.522Z,Internet Exchange 2k7,08D0463778A04E9F,11,10.237.48.5:55293,189.204.46.68:25,<,220 Start TLS negotiation.,
2013-07-03T20:50:19.522Z,Internet Exchange 2k7,08D0463778A04E9F,12,10.237.48.5:55293,189.204.46.68:25,*,,Received certificate
2013-07-03T20:50:19.522Z,Internet Exchange 2k7,08D0463778A04E9F,13,10.237.48.5:55293,189.204.46.68:25,*,658090B65DBC7E794F89ABAACE6DA76646061E8D,Certificate thumbprint
2013-07-03T20:50:19.522Z,Internet Exchange 2k7,08D0463778A04E9F,14,10.237.48.5:55293,189.204.46.68:25,>,EHLO smtp.dom-orig.com.mx,
2013-07-03T20:50:19.538Z,Internet Exchange 2k7,08D0463778A04E9F,15,10.237.48.5:55293,189.204.46.68:25,<,503 Bad sequence of commands,
2013-07-03T20:50:19.538Z,Internet Exchange 2k7,08D0463778A04E9F,16,10.237.48.5:55293,189.204.46.68:25,>,HELO smtp.dom-orig.com.mx,
2013-07-03T20:50:19.553Z,Internet Exchange 2k7,08D0463778A04E9F,17,10.237.48.5:55293,189.204.46.68:25,<,503 Bad sequence of commands,
2013-07-03T20:50:19.553Z,Internet Exchange 2k7,08D0463778A04E9F,18,10.237.48.5:55293,189.204.46.68:25,>,QUIT,
2013-07-03T20:50:19.553Z,Internet Exchange 2k7,08D0463778A04E9F,19,10.237.48.5:55293,189.204.46.68:25,<,221 Closing connection.,
2013-07-03T20:50:19.553Z,Internet Exchange 2k7,08D0463778A04E9F,20,10.237.48.5:55293,189.204.46.68:25,-,,Local
I don't understand why in the sequence, appear some thing about certificates...
If I use the netmon, appear in the SMTP trace : SslOnSmtp: SSLv2RecordLayer, Error (needs reassembly), I found something about the certificate, but I don't have experience in this area..
Thanks