On 20/09/2018 10.28, Per Jessen wrote:
Carlos E. R. wrote:
On 20/09/2018 09.37, Per Jessen wrote:
Carlos E. R. wrote:
On 20/09/2018 02.48, Per Jessen wrote:
Carlos E. R. wrote:
Restricting port 25 and asking people to use port 587 for mail submission has been standard ISP practice for years and years.
Not in Spain. They don't block anything. Freedom, you know? ;-p
Do they not block port 25 to other than their own networks? That is what usually happens - outbound port 25 to other networks in blocked, and the standard support answer is 'use port 587'.
Telefonica blocks nothing, and their standard support answer is to use 25. The 587 is not supported, which is why I can not post now from Canada using Telefonica:
That is not what I meant.
A typical scenario would be - Carlos Shop S.A. has an access provider for the office. They also have an email provider for carlos-shop-sa.es. The access provider blocks port 25 outbound to other networks than their own. Carlos Shop S.A. uses port 587 to submit mails via their email provider.
For years I have been sending mail on port 25 to any provider, like gmail.
Okay, I'm surprised they don't block that. It's usually the very first anti-spam measure access providers use.
Well, that's the thing, they don't block any port that I know. You may be able to browse windows computers shares across internet here. I remember that I got such attempts when I was using a modem, not a router with NAT. And I like they don't block anything! I find disgusting that Bell is blocking my access to Telefonica. If someone is using the net to spam, kill that person full access, not everybody access to some port. It is simple, if someone uses port 25, investigate. Or allow a simple manner for a client to request open port 25. I'm a good guy and such. -- Cheers / Saludos, Carlos E. R. (from openSUSE 15.0 (Legolas))