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On 7/15/2011 5:55 PM, Murray S. Kucherawy wrote:
>> -----Original Message-----
>> From: firstname.lastname@example.org [mailto:email@example.com] On Behalf Of Frank Bonnet
>> Sent: Thursday, July 14, 2011 10:08 PM
>> To: firstname.lastname@example.org
>> Subject: Re: Large ISP which use Postfix
>> Anyone knows what Google or Hotmail use ?
> I'm over 90% sure they each rolled their own.
Hotmail uses Microsoft's SMTP server. Read about the conversion from
BSD to Windows after Microsoft bought Hotmail: