On Monday, September 13, 2004, 14:31:33, Tom Pepper wrote: > I'd appreciate it you help clarify for me a couple of questions > concerning SPF. > Our mail server requires authentication.
Thank you :-) > 1) We have several laptops that are taken out of the network and used from > various locations, such as home or while on the road, and some pc's that are > used at home. In all cases, our domain is set up on them for email. > > For those who have an outside ISP that allow users to authenticate to our > mail server (sharpcom.com) may I assume that there are no issues with our > SFP, even though the IP address on the computer will be different than our > network IPs? Its your MTA's IP address that will be contacting other MTAs, not the MUA that asked it to relay. > 2) For those computers that do *not* have an ISP that will allow > authentication through our mail server, and require us to use their > outgoing mail server, I further assume we must add individual IPs or > IP blocks as exceptions in our SPF records? Depends on if the envelope sender address is [EMAIL PROTECTED] or if they're sending as [EMAIL PROTECTED] If the latter then yes, you'll have to identify each and every outgoing server from all the possible ISP's that your users might conceivably use and make sure you keep it updated every time one of those ISPs changes its configuration. Note that this and the forwarding issue are two of the stumbling blocks in the acceptance of Sender Policy Framework. -- [EMAIL PROTECTED] "The avalanche has already started, it is too Rod Dorman late for the pebbles to vote." � Ambassador Kosh To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
