Re: ISP blocking port 25, how to send mail from Iseries

[John Ross <jross-ml@xxxxxxxxxxxxxxx>]

I would double check the blocking of port 25 outbound. Blocking port 25 
inbound would make since, but blocking port 25 outbound seams like that 
will decrease their business a lot. If they are blocking port 25 
outbound to stop spammers from sending spam they are also stopping 
normal users from sending email. I would check if maybe your IP address 
was reported as a spammer and they blocked port 25 for just that IP 
address, I have heard of that. Maybe the IP addresses was reported as a 
spammer before you got the IP address, they might switch who has what IP 
addresses to stop servers also.

John Ross

Art Tostaine, Jr. wrote:

> We used to send emails using our AS/400 SMTP server.  Now, Cablevision
> in NJ blocking port 25 (Comcast did this 2 weeks ago)
>
> We use another ISP to host our web server and email server, and in
> outlook, we had to change to port 587 to reach the smtp server from
> outlook.
>
> So, is there a way to change the AS/400 to use that mail router?  I
> was thinking of putting mail1.myisp.com:587, but I might need to use
> Pop3 authentication before sending.
>
> Anyone else doing this?