I have a new 2010 server that I introduced into an existing 2007 environment after introducing and then decommissioning a 2013 server. Everything appeared to be working properly, so I migrated mailboxes without issue. Email is going in and out, and the 2007 server can send to 2010 mailboxes. The public folder hierarchy is not updating on the 2010 server, so I started digging into it, and on the 2010 server, I see 4 outbound messages in the Hub Version 8 queue. The error message on the queue is "421 4.4.2 SocketError". I have created several different receive connectors on the 2007 side without success. I turned on protocol logging on a new receive connector I created on the 2007 server with Exchange Server authentication and the correct IP. The log is below. It appears to disconnect from the 2007 server side after sending the certificate (which is the self-signed certificate). Any help is appreciated!
2015-01-26T22:25:27.182Z,2007server\Exchange 2010,023ED784AE1452FF,0,192.168.1.10:25,192.168.1.11:9446,+,,2015-01-26T22:25:27.182Z,2007server\Exchange 2010,023ED784AE1452FF,1,192.168.1.10:25,192.168.1.11:9446,*,None,Set Session Permissions
2015-01-26T22:25:27.182Z,2007server\Exchange 2010,023ED784AE1452FF,2,192.168.1.10:25,192.168.1.11:9446,>,"220 2007server.domain.com Microsoft ESMTP MAIL Service ready at Mon, 26 Jan 2015 16:25:26 -0600",
2015-01-26T22:25:27.182Z,2007server\Exchange 2010,023ED784AE1452FF,3,192.168.1.10:25,192.168.1.11:9446,<,EHLO EXCH2010.domain.com,
2015-01-26T22:25:27.182Z,2007server\Exchange 2010,023ED784AE1452FF,4,192.168.1.10:25,192.168.1.11:9446,>,250-2007server.domain.com Hello [192.168.1.11],
2015-01-26T22:25:27.182Z,2007server\Exchange 2010,023ED784AE1452FF,5,192.168.1.10:25,192.168.1.11:9446,>,250-SIZE,
2015-01-26T22:25:27.182Z,2007server\Exchange 2010,023ED784AE1452FF,6,192.168.1.10:25,192.168.1.11:9446,>,250-PIPELINING,
2015-01-26T22:25:27.182Z,2007server\Exchange 2010,023ED784AE1452FF,7,192.168.1.10:25,192.168.1.11:9446,>,250-DSN,
2015-01-26T22:25:27.182Z,2007server\Exchange 2010,023ED784AE1452FF,8,192.168.1.10:25,192.168.1.11:9446,>,250-ENHANCEDSTATUSCODES,
2015-01-26T22:25:27.182Z,2007server\Exchange 2010,023ED784AE1452FF,9,192.168.1.10:25,192.168.1.11:9446,>,250-STARTTLS,
2015-01-26T22:25:27.182Z,2007server\Exchange 2010,023ED784AE1452FF,10,192.168.1.10:25,192.168.1.11:9446,>,250-X-ANONYMOUSTLS,
2015-01-26T22:25:27.182Z,2007server\Exchange 2010,023ED784AE1452FF,11,192.168.1.10:25,192.168.1.11:9446,>,250-AUTH,
2015-01-26T22:25:27.182Z,2007server\Exchange 2010,023ED784AE1452FF,12,192.168.1.10:25,192.168.1.11:9446,>,250-X-EXPS GSSAPI NTLM,
2015-01-26T22:25:27.182Z,2007server\Exchange 2010,023ED784AE1452FF,13,192.168.1.10:25,192.168.1.11:9446,>,250-8BITMIME,
2015-01-26T22:25:27.182Z,2007server\Exchange 2010,023ED784AE1452FF,14,192.168.1.10:25,192.168.1.11:9446,>,250-BINARYMIME,
2015-01-26T22:25:27.182Z,2007server\Exchange 2010,023ED784AE1452FF,15,192.168.1.10:25,192.168.1.11:9446,>,250-CHUNKING,
2015-01-26T22:25:27.182Z,2007server\Exchange 2010,023ED784AE1452FF,16,192.168.1.10:25,192.168.1.11:9446,>,250-XEXCH50,
2015-01-26T22:25:27.182Z,2007server\Exchange 2010,023ED784AE1452FF,17,192.168.1.10:25,192.168.1.11:9446,>,250 XRDST,
2015-01-26T22:25:27.182Z,2007server\Exchange 2010,023ED784AE1452FF,18,192.168.1.10:25,192.168.1.11:9446,<,X-ANONYMOUSTLS,
2015-01-26T22:25:27.182Z,2007server\Exchange 2010,023ED784AE1452FF,19,192.168.1.10:25,192.168.1.11:9446,>,220 2.0.0 SMTP server ready,
2015-01-26T22:25:27.182Z,2007server\Exchange 2010,023ED784AE1452FF,20,192.168.1.10:25,192.168.1.11:9446,*,,Sending certificate
2015-01-26T22:25:27.182Z,2007server\Exchange 2010,023ED784AE1452FF,21,192.168.1.10:25,192.168.1.11:9446,*,"CN=2007server, DC=domain, DC=com",Certificate subject
2015-01-26T22:25:27.182Z,2007server\Exchange 2010,023ED784AE1452FF,22,192.168.1.10:25,192.168.1.11:9446,*,"CN=2007server, DC=domain, DC=com",Certificate issuer name
2015-01-26T22:25:27.182Z,2007server\Exchange 2010,023ED784AE1452FF,23,192.168.1.10:25,192.168.1.11:9446,*,02DFDECB010E0980428F5CCBECE96999,Certificate serial number
2015-01-26T22:25:27.182Z,2007server\Exchange 2010,023ED784AE1452FF,24,192.168.1.10:25,192.168.1.11:9446,*,1C3BACCF6BD4E4C4955F6A531D707A0EDF86BBA2,Certificate thumbprint
2015-01-26T22:25:27.182Z,2007server\Exchange 2010,023ED784AE1452FF,25,192.168.1.10:25,192.168.1.11:9446,*,2007server,Certificate alternate names
2015-01-26T22:25:27.182Z,2007server\Exchange 2010,023ED784AE1452FF,26,192.168.1.10:25,192.168.1.11:9446,-,,Local