Have a client with approx 40 users on SBS2011 network, and we are having issues with a coupe of Toshiba printers getting outside the LAN. This has shown up with Scan to Email feature, but I am fairly certain the issue is deeper than this.
We have triple-checked the SMTP Client settings on the machines, and used several different outbound mails servers. The mails will intermittently succeed, but mostly not - with "failed to connect to SMTP server". This happens about 70% of the time. The rest go through OK. There does not appear to be any rhyme or reason.
The computers on the network are not having any problems (ever) going to the SMTP server - only the two Toshiba printers (we event brought in a 3rd "test" printer with the same results). The IpV4 TCPIP settings are the same - gateway, dns, etc as the PCs. We have tried both static and DHCP.
While the web administration interface of the printers does not allow for PING or network checks, it is possible to do this via the LCD panel (tedious, as you can imagine). I have seen the printers fail when pinging a ubiquitous external IP like 220.127.116.11, but the PCs never fail. How could this be? The firewall egress is wide open. It does not block any outbound traffic.
Is the any Active Directory, SBS2011 Domain Controller or Group Policy setting that might intermittently prevent the printers from getting outside the LAN