[BlueOnyx:21421] Re: Can't SMPT or SSH

[Lewis Gardner]

>> Like I said, this worked before on a different subnet. We just had to
>> change IPs for a faster connection. There is no DMZ, just the main
>> network's router on one IP, the 5209R on another and some wireless
>> access points on another two.
> 
> Hmm ... it could be that port 25 is blocked from the outside. Some ISP's
> do that for consumer internet access.

They have claimed fifteen ways to Sunday that they are not blocking 
anything. I have my doubts...

Back when I was smarter it seems I used tcpdump to watch traffic on 
ports. Would that be a thing to do here?


> In that case: See if you have "Enable Submission Port" ticked under
> "Network Services" / "Email" in the "Basic" tab. That opens port 587 for
> Sendmail as well, so it'll listen on :25, :465 and :587.
> 
> In that case then try "telnet <ip> 587" and see if that might work.

That does work! Does that mean we have to change 40+ user's email 
configuration?