[SonicWALL]- iMail fails to connect through SonicWall from LAN

[Administrator2]

I have set up my iMail Server on a one to one NAT  (192.168.155.98) behinf my SonicWall DMZ.  I can send and receive mail from  machines  that have a public address but my mail now fails on our LAN.  Has anyone ever had this issue. I can access secure web mail from a pub   Ports that are open are 25, 110 and 443 (or SSL Web Mail) Rules for each service:    Allow  SMTP  *    192.168.155.98  Enabled  Allow  POP3  *    192.168.155.98  Enabled  Allow  SSL    *     192.168.155.98  Enabled   Anything missing?   Kevin M. Donovan, MCSE Network Support Specialist IntelliWare Systems, Inc.   Phone (817) 277-0800 x228