As an aside, instead of post@, posterous should use a guid for each blog. e.g.
B566EA61026F474BA8ADB877FF765087@postereous.com
If you're on another device just email whoami@postereous.com and it responds with with your GUID post address. Of course email is hardly confidential, and it would be sent in the clear, but it's a heck of a lot more powerful than simply looking at a from address.
How embarrassing for you. How exactly would the email go to the forger if they are spoofing YOUR email address. Coffee in the morning, gin at night. Never switch the two.
B566EA61026F474BA8ADB877FF765087@postereous.com
If you're on another device just email whoami@postereous.com and it responds with with your GUID post address. Of course email is hardly confidential, and it would be sent in the clear, but it's a heck of a lot more powerful than simply looking at a from address.