Recently I switched from cable to ADSL.
Under "cable", I had a D-Link DI-614+ router connected to the modem, using PPPoE. It's firmware was upgraded to the latest version (2.20).
All PC's and the router used the correct provider's smtp server. All outgoing mail arrived as expected, including the router's logs.
Now the router is connected to my Alcated Speedlink 530 ethernet modem (1 port). I changed SMTP servers and PC's appear to send mail correctly. The router itsef however fails sending mail (haven't got much info other than a message like "Failed sending mail").
What could be wrong?
As far as I know I have no restrictions in SMTP ports (both the modem and the router have a firewall).
The modem has internal IP address 10.0.0.138 and assigns 10.0.0.150 to the router.
The router uses 192.168.0.1 internally and all PC's have adresses in that range (.150 - .250).
The ADSL connection is by KPN (for any dutch readers), and is appearently using PPTP. My knowledge is very limited on that (none!). I have connected the router to the modem using an "ethernet" connection type (not PPPoE, not PPTP). No problems using mail, MSN, browsing, FTP etc. from a PC. Only SMTP from the router.