Comcast (and others) Block Port 25

[Duff]

I know I'm late to this party, but up until last week I was able to
send email from all 10 of my sites using port 25.

In my case, Comcast was NOT blocking port 25. But that changed
during the week and I had to change Microsoft Outlook to use port 587
for each account.

[Lee Sharp]

Post by Duff
I know I'm late to this party, but up until last week I was able to
send email from all 10 of my sites using port 25.
In my case, Comcast was NOT blocking port 25. But that changed
during the week and I had to change Microsoft Outlook to use port 587
for each account.

Business or residential accounts? And is this why the alert system has
been so quiet? :)

Lee

[Duff]

Post by Lee Sharp

Post by Duff
I know I'm late to this party, but up until last week I was able to
send email from all 10 of my sites using port 25.
In my case, Comcast was NOT blocking port 25. But that changed
during the week and I had to change Microsoft Outlook to use port 587
for each account.

Business or residential accounts? And is this why the alert system has
been so quiet? :)
Lee

I think my account is residential.

I thought my dynamic IP address was blocked from using email port 25
so I asked them to unblock it but they said it wasn't blocked. A
comcast lady said to try port 587 instead and it worked, but only for
comcast email. I have to use comcast to send all my mail now, even
though last week, I could send from each of mydomain.com mail servers.

Having a dynamic address should mean that it is simple to change it.
I just need to power off the cable modem and when it comes back up it
will give me a new dynamic address, right? WRONG!! I shut it down
and disconnected it from the wall. I then powered everything off.
Reconnected and rebooted everything and the same address comes up.
Called support and they had me do a ipconfig release and renew. Same
IP address comes up every time.

Bottom line is that I could send email from all mail servers last week
and today, only comcast email will send and it requires port 587.

I really have no idea what has happened. I'm now considering AT&T
U-verse

[Lee Sharp]

Post by Duff

Post by Lee Sharp

Post by Duff
I know I'm late to this party, but up until last week I was able to
send email from all 10 of my sites using port 25.
In my case, Comcast was NOT blocking port 25. But that changed
during the week and I had to change Microsoft Outlook to use port 587
for each account.

Business or residential accounts? And is this why the alert system has
been so quiet? :)
Lee

I think my account is residential.
I thought my dynamic IP address was blocked from using email port 25
so I asked them to unblock it but they said it wasn't blocked. A
comcast lady said to try port 587 instead and it worked, but only for
comcast email. I have to use comcast to send all my mail now, even
though last week, I could send from each of mydomain.com mail servers.
Having a dynamic address should mean that it is simple to change it.
I just need to power off the cable modem and when it comes back up it
will give me a new dynamic address, right? WRONG!! I shut it down
and disconnected it from the wall. I then powered everything off.
Reconnected and rebooted everything and the same address comes up.
Called support and they had me do a ipconfig release and renew. Same
IP address comes up every time.
Bottom line is that I could send email from all mail servers last week
and today, only comcast email will send and it requires port 587.
I really have no idea what has happened. I'm now considering AT&T
U-verse

Use telnet to send an e-mail manually and see where it fails. It could
be anywhere along the path... I bet it is comcast, but it *could* be
anywhere.

Lee

[Pirate]

Post by Duff

Post by Lee Sharp

Post by Duff
I know I'm late to this party, but up until last week I was able to
send email from all 10 of my sites using port 25.
In my case, Comcast was NOT blocking port 25. But that changed
during the week and I had to change Microsoft Outlook to use port 587
for each account.

Business or residential accounts? And is this why the alert system has
been so quiet? :)
Lee

I think my account is residential.
I thought my dynamic IP address was blocked from using email port 25
so I asked them to unblock it but they said it wasn't blocked. A
comcast lady said to try port 587 instead and it worked, but only for
comcast email. I have to use comcast to send all my mail now, even
though last week, I could send from each of mydomain.com mail servers.
Having a dynamic address should mean that it is simple to change it.
I just need to power off the cable modem and when it comes back up it
will give me a new dynamic address, right? WRONG!! I shut it down
and disconnected it from the wall. I then powered everything off.
Reconnected and rebooted everything and the same address comes up.
Called support and they had me do a ipconfig release and renew. Same
IP address comes up every time.
Bottom line is that I could send email from all mail servers last week
and today, only comcast email will send and it requires port 587.
I really have no idea what has happened. I'm now considering AT&T
U-verse

To change IP, not only do you have to power off the modem for a few
minutes. but their "dynamic IP" pool will remember your old IP based
on the MAC address for about 2-3 months.. I know.. I have a few
routers and I scribble the IP it gets on it and about once every 2
months I get them out and pop em online.. same ole IP.

[j***@brokersys.com]

Post by Lee Sharp

Post by Duff
I know I'm late to this party, but up until last week I was able to
send email from all 10 of my sites using port 25.
In my case, Comcast was NOT blocking port 25. But that changed
during the week and I had to change Microsoft Outlook to use port 587
for each account.

Business or residential accounts? And is this why the alert system has
been so quiet? :)

As of a few seconds ago, my business class cablemodem here at the house
did NOT have port 25 filtered.

[Duff]

Post by j***@brokersys.com

Post by Lee Sharp

Post by Duff
I know I'm late to this party, but up until last week I was able to
send email from all 10 of my sites using port 25.
In my case, Comcast was NOT blocking port 25. But that changed
during the week and I had to change Microsoft Outlook to use port 587
for each account.

Business or residential accounts? And is this why the alert system has
been so quiet? :)

As of a few seconds ago, my business class cablemodem here at the house
did NOT have port 25 filtered.

I really want to know what solutions exist for being able to have
email work with outlook on my own domains. Comcast residential
edition now blocks that capability for sending - port 25 and 587'
email from those sites.

So one solution is to get the business account

Of course I can use webmail from those accounts but that's not using
oulook.

Any other solutions?

[Lee Sharp]

Post by Duff
I really want to know what solutions exist for being able to have
email work with outlook on my own domains. Comcast residential
edition now blocks that capability for sending - port 25 and 587'
email from those sites.
So one solution is to get the business account

So comcast won't help on residential? Wow... Anyway, on the server,
have an alternate port, or use ssl wich uses an alternate port.

Lee