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Re:Posterous (YC summer 08) Beats Tumblr In Simplicity by soundsop on Saturday June 28, 2008 @08:01PM (#230856)
we’ll give a free TechCrunch Tshirt to the first person who manages to do a fake post on our Posterous blog

Look's like there are already two fake posts: http://techcrunch.posterous.com/ using http://deadfake.com

Re:Posterous (YC summer 08) Beats Tumblr In Simplicity by marketer on Saturday June 28, 2008 @09:03PM (#230878)
Shouldn't be hard to fix that - they just need to keep track of the originating SMTP server of the first e-mail.
Re:Posterous (YC summer 08) Beats Tumblr In Simplicity by drm237 on Saturday June 28, 2008 @09:32PM (#230895)
Since many large email providers use clusters of smtp servers, it's probably better to try to use SPF records or Domain Keys signing leaving the originating smtp server as a latter resort. Even reverse dns lookups might be partly helpful but if someone controls the ip they could change that easily...

Interesting problem over. I love the service though. Congrats guys!

Re:Posterous (YC summer 08) Beats Tumblr In Simplicity by tlrobinson on Sunday June 29, 2008 @12:08AM (#230957)
And what happens if you use gmail or any other large email host?
Re:Posterous (YC summer 08) Beats Tumblr In Simplicity by nickb on Sunday June 29, 2008 @01:44AM (#230992)
How will you get <fake>@gmail.com?
Re:Posterous (YC summer 08) Beats Tumblr In Simplicity by tlrobinson on Sunday June 29, 2008 @02:08AM (#231010)
I wouldn't be surprised if there are large hosts that don't check for spoofed "from" addresses. Maybe not Gmail, but I haven't checked.