Security Basics mailing list archives
Re: Blocking Outlook External POP/SMTP
From: Phillip Bailey <pbailey () cryptolife org>
Date: Tue, 16 Mar 2010 12:12:17 +0100
Hi, first you must completely close the firewall and then allow pop3/s - imap/s - smtp to and from your mail server. This solution won't fix completely the problem because there's also the webmail that can be accessed on port 80 and 443, for this issue I can advise to use a good proxy server with some blacklisting. Best regards , Phillip Hart, Lee Anne wrote:
Hello, I'm looking for information on preventing/prohibiting users from utilizing Outlook (at work) to retrieve their personal email from Gmail, AOL, Yahoo, Comcast, Verizon, etc. Looking for the following: * Reasons why users should not be allowed to use Outlook on their work computers to retrieve their personal email. * Tools/techniques to block this type of traffic. It seems the most common ports are 110, 465, 587, 993, and 995. Are there others? Any reference are much appreciated. Thank you! Lee Anne
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Current thread:
- Blocking Outlook External POP/SMTP Hart, Lee Anne (Mar 15)
- Re: Blocking Outlook External POP/SMTP Ansgar Wiechers (Mar 15)
- Re: Blocking Outlook External POP/SMTP Gareth Fletcher (Mar 16)
- Re: Blocking Outlook External POP/SMTP Gichuki John Chuksjonia (Mar 16)
- Re: Blocking Outlook External POP/SMTP Stephen Mullins (Mar 16)
- Re: Blocking Outlook External POP/SMTP Kurt Buff (Mar 16)
- RE: Blocking Outlook External POP/SMTP Jay Vlavianos (Mar 16)
- Re: Blocking Outlook External POP/SMTP phillip bailey (Mar 16)
- Re: Blocking Outlook External POP/SMTP Jon Janego (Mar 16)
- Re: Blocking Outlook External POP/SMTP gig (Mar 16)
- Re: Blocking Outlook External POP/SMTP Phillip Bailey (Mar 16)
- Re: Blocking Outlook External POP/SMTP Pierre Jaury (Mar 16)
- Re: Blocking Outlook External POP/SMTP Nikhil Wagholikar (Mar 16)
- RE: Blocking Outlook External POP/SMTP Christian Campbell (Mar 22)
- Re: Blocking Outlook External POP/SMTP Francois Yang (Mar 22)
- <Possible follow-ups>
- Re: Blocking Outlook External POP/SMTP krymson (Mar 17)