nanog mailing list archives
Re: Blocking MX query
From: Ibrahim <ibrahim1 () gmail com>
Date: Wed, 5 Sep 2012 09:57:32 +0700
All, thanks for the input and comment. In summary, I will block TCP port 25. My DNS loadbalancer (F5) can filter MX query and need license to do it. But given the information the botnet use address list with pre-resolved IP addresses then blocking MX query is not the answer :-) Thanks & Regards Ibrahim On Wed, Sep 5, 2012 at 9:18 AM, George Herbert <george.herbert () gmail com>wrote:
On Sep 4, 2012, at 12:07 PM, William Herrin <bill () herrin us> wrote:You are. You should be doing SMTP Auth to *your* email server on which you have an authorized account and then letting it relay your messages to the world.This is not the thread for this conversation per se. The practicality of general ISP 25 blocking is established for antispam purposes. So are power users running home domains. Different user profiles. Different circumstances. George William Herbert Sent from my iPhone
Current thread:
- Re: Blocking MX query, (continued)
- Re: Blocking MX query Suresh Ramasubramanian (Sep 04)
- Re: Blocking MX query Masataka Ohta (Sep 04)
- Re: Blocking MX query Suresh Ramasubramanian (Sep 04)
- Re: Blocking MX query valdis . kletnieks (Sep 04)
- Re: Blocking MX query Masataka Ohta (Sep 04)
- Re: Blocking MX query Suresh Ramasubramanian (Sep 04)
- Re: Blocking MX query David Barak (Sep 05)
- Re: Blocking MX query William Herrin (Sep 04)
- Re: Blocking MX query Jay Ashworth (Sep 04)
- Re: Blocking MX query George Herbert (Sep 04)
- Re: Blocking MX query Ibrahim (Sep 04)
- Re: Blocking MX query William Herrin (Sep 04)
- Re: Blocking MX query Jay Ashworth (Sep 04)
- Re: Blocking MX query William Herrin (Sep 04)
- Re: Blocking MX query Michael Thomas (Sep 04)