This lists common network ports used by different devices. It will focus mainly on ports that are needed to allow a device/service to function across a firewall zone for clients.

====Printers====
https://www.cups.org/doc/firewalls.html
<code>
21 (FTP)        TCP     FTP (optional)
23 (Telnet)     TCP     Telnet (optional)
80 (HTTP)       TCP     Web UI
8080 (HTTP ALT) TCP     Alternative HTTP Port (optional)
137 (WINS)	UDP	Windows Internet Naming Service (name lookup for SMB printing). (optional)
139 (SMB)	TCP	Windows SMB printing. (optional)
161 (SNMP)	UDP	SNMP browsing (broadcast) and status monitoring (directed to printer IP address).
443 (IPPS)	TCP	Internet Printing Protocol requests and responses (print jobs, status monitoring, etc.)
445 (SMBDS)	TCP	Windows SMB Domain Server (authenticated SMB printing). (optional)
515 (LPD)	TCP	Line Printer Daemon (LPD/lpr) print job submission and status monitoring.
631 (IPP/IPPS)	TCP	Internet Printing Protocol requests and responses (print jobs, status monitoring, etc.)
5353 (mDNS)	UDP	Multicast DNS lookups.
9100-9102	TCP	Raw print data stream (AppSocket/JetDirect).
9500            TCP     Scanner port
</code>

====Zimbra Mail Server====
https://wiki.zimbra.com/wiki/Firewall_Configuration

<code>
SMTP	25	tcp	Public
HTTP	80	tcp	should probably be limited by a firewall to your local network only
POP3	110	tcp	should probably be limited by a firewall to your local network only
IMAP	143	tcp	should probably be limited by a firewall to your local network only
LDAP	389	tcp	should probably be limited by a firewall to your local network only
HTTPS	443	tcp	Public
SMTPS	465	tcp	Public
SMTP Submission	587	tcp	Public
IMAPS	993	tcp	Public
POP3S	995	tcp	Public
(Admin Interface)	7071	tcp	should probably be limited by a firewall to your local network only
SOAP Auth	7073	tcp	should probably be limited by a firewall to your local network only
LMTP	7025	tcp	should probably be limited by a firewall to your local network only
</code>