Does anyone have any experience configuring Postfix, so it 
would relay email from iPhones without becoming an open relay.

The iPhone is a mobile phone, among other things,  and the 
network to which it connects would change, as the user move 
from location to location.  Also, the dynamic IP address of 
the iPhone would change as the iPhone connects to different 
network, or even within the current network to which it is 
connected.

Currently my email server, (eg Postfix) will only relay 
email from local IP address within my local network.  The 
local computer's IP address must be included in the 
/etc/mail/access.db with "RELAY" privileges before Postfix 
will relay the mail.  I could RELAY for all computers within 
my smvfp.com domain, but the iPhone will generlly connect to 
various domain other than the smvfp.com domain, and there is 
no way to know beforehand the domain, network, or IP address 
the iPhone will have.

Regards,

LelandJ




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