El vie, 25-06-2004 a las 15:46, Boris Ratner escribi�: > Hi! > > Some mail servers on the net have something "callback authentication" > procedure installed. > It goes like that: > 1. you type in : "mail from: [EMAIL PROTECTED]" > 2. the server digs for the MX of bar.com . if MX is not found rejects > the incoming mail. > 3. if MX found the server contacts the MX on SMTP with : > "mail from: <>" > "rcpt to: <[EMAIL PROTECTED]>" > 4. if any error accurs during this(3) the incoming mail (1) rejected. > connection to MX closed. > 5. if the user in (3) is OKed by the MX - incoming mail (1) approved. > and connection to MX closed. > > This system is based on standards but usually have 2 problems: > 1. 'bar.com' doesn't have an MX -> IMHO if you have a DNS domain to > recieve mail you should have an MX. > 2. MX of 'bar.com' - refuses "mail from: <>" (3, above) with errors > such as "5xx bogus mail from". This beheiviour is > WRONG and makes additional problems to the users of the domain. > > So , I think you should get yourself an MX. > Any REAL mail address has an MX resolvable domain, just use a REAL FROM:
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