NormanSI gave her time to steal my mind away MVM join:2001-02-14 San Jose, CA TP-Link TD-8616 Asus RT-AC66U B1 Netgear FR114P
|
to JohnInSJ
Re: Comcast decides to block port 25 IN and OUT with no notice.said by JohnInSJ:didn't see the quit, thought he just disconnected - forgive me. Whatever, no port 25 on residential, that's the rule. Whose rule? And how do you actually determine "residential"? I test for "DUL" on my server; "Dynamic User List". Do you see the difference? 173-228-99-1x.dsl.dynamic.sonic.net 173-228-7-21x.dsl.static.sonic.net The first is not allowed to run servers; indeed, port 25 will be blocked both directions. The second is allowed to run servers, with port 25 access not blocked. Upon receiving my static IP address assignment, I used the control to set my rDNS to 'mxa.mydomain.tld'. So how should this work on my end? Your MX: "Banner" My MX: "EHLO mxa.mydomain.tld" Your MX: "Pleased to meet you, mxa.mydomain.tld" My MX: "MAIL FROM norman@mydomain.tld" Your MX: "norman@mydomain.tld OK, SEND RCPTS" My MX: "RCPT TO: you@yourdomain.tld" And so on; why should you have a problem with that? |
|
JohnInSJ Premium Member join:2003-09-22 Aptos, CA |
JohnInSJ
Premium Member
2013-Mar-1 7:26 pm
said by NormanS:said by JohnInSJ:didn't see the quit, thought he just disconnected - forgive me. Whatever, no port 25 on residential, that's the rule. Whose rule? And how do you actually determine "residential"? I test for "DUL" on my server; "Dynamic User List". Comcast's rule, per the post title, is that they will block port 25 on residential accounts. Am I in the wrong thread? I frankly don't care at all, I am on business class with static IPs because the features and access I require are available with that service. |
|
NormanSI gave her time to steal my mind away MVM join:2001-02-14 San Jose, CA TP-Link TD-8616 Asus RT-AC66U B1 Netgear FR114P
|
said by JohnInSJ:Comcast's rule, per the post title, is that they will block port 25 on residential accounts.
Am I in the wrong thread? No, but I was sucked away from the OPs concerns by my own obstinacy. OP wants to test an off-Comcast network SMTP server, and definitely should get a business-class account for that purpose. |
|
ArrayListDevOps Premium Member join:2005-03-19 Mullica Hill, NJ |
said by NormanS:OP wants to test an off-Comcast network SMTP server, and definitely should get a business-class account for that purpose. really? a business class connection just to test if port 25 is working? |
|
JohnInSJ Premium Member join:2003-09-22 Aptos, CA |
JohnInSJ
Premium Member
2013-Mar-16 10:23 am
said by ArrayList:said by NormanS:OP wants to test an off-Comcast network SMTP server, and definitely should get a business-class account for that purpose. really? a business class connection just to test if port 25 is working? Why does a residential user need to "test if port 25 is working" on a server they don't run? |
|
ArrayListDevOps Premium Member join:2005-03-19 Mullica Hill, NJ |
ArrayList
Premium Member
2013-Mar-16 11:35 am
the server is not run on the business class connection. That alone says that you don't need business level service. |
|
JohnInSJ Premium Member join:2003-09-22 Aptos, CA |
JohnInSJ
Premium Member
2013-Mar-16 4:12 pm
said by ArrayList:the server is not run on the business class connection. That alone says that you don't need business level service. I have no idea what you're saying here. You aren't allowed to run any server on residential. Only an SMTP SERVER needs to send traffic on port 25. Therefore you need to be on business class to send traffic on port 25. QED |
|
NormanSI gave her time to steal my mind away MVM join:2001-02-14 San Jose, CA TP-Link TD-8616 Asus RT-AC66U B1 Netgear FR114P
1 edit |
to ArrayList
said by ArrayList:said by NormanS:OP wants to test an off-Comcast network SMTP server, and definitely should get a business-class account for that purpose. really? a business class connection just to test if port 25 is working? Yes, because port 25 is no longer a standard user port; hasn't really been since RFC 2476 was published in December, 1998. |
|
ArrayListDevOps Premium Member join:2005-03-19 Mullica Hill, NJ |
to JohnInSJ
said by JohnInSJ:said by ArrayList:the server is not run on the business class connection. That alone says that you don't need business level service. I have no idea what you're saying here. I don't run a server on my connection, why can't I open a tcp connection to a remote server over port 25 without paying more money for the privilege to do so? I really don't care either way. Spammers will spam regardless of what Comcast does. |
|
AVonGauss Premium Member join:2007-11-01 Boynton Beach, FL |
Blocking outbound 25/tcp significantly lowers the amount of e-mail spam coming from an ISP. If you run a mail server, it's very easy to tell who is blocking and who is not blocking based on the spam mail attempts.
I probably already said this in this thread, but Comcast should have done this years ago. |
|
graysonf MVM join:1999-07-16 Fort Lauderdale, FL
1 recommendation |
to ArrayList
Get a free shell account on » www.cjb.netConnect anywhere you want to destination port TCP 25. |
|
JohnInSJ Premium Member join:2003-09-22 Aptos, CA
1 recommendation |
to ArrayList
said by ArrayList:said by JohnInSJ:said by ArrayList:the server is not run on the business class connection. That alone says that you don't need business level service. I have no idea what you're saying here. I don't run a server on my connection, why can't I open a tcp connection to a remote server over port 25 without paying more money for the privilege to do so? I really don't care either way. Spammers will spam regardless of what Comcast does. Port 25 communications is reserved for servers. That's why. |
|
NormanSI gave her time to steal my mind away MVM join:2001-02-14 San Jose, CA TP-Link TD-8616 Asus RT-AC66U B1 Netgear FR114P
|
to ArrayList
said by ArrayList:Spammers will spam regardless of what Comcast does. Prior to 2002, when SBC blocked customer access to port 25, SBC residential hosts were the most prevalent spam source IP addresses in my server logs. Subsequent to the blocking, SBC residential hosts dropped to near last. While spammers continued to spam, they were much less successful at using compromised SBC residential customer hosts. FWIW, SBC led Comcast until the blocks. After the SBC blocks, SBC dropped behind Comcast as a spam source. From which I deduced that blocking port 25 reduced the amount of abuse coming from SBC. |
|