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PIX - No Fixup SMTP

Unanswered Question
Jan 21st, 2002
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we are running an IDC giving mail servie to our clients e-mail. We also use no fixup for smtp. When fixup is enabled, it blocks the standard smtp message with *******. Without SMTP fixup, you can

message: 220 tester.responsys.com


we are using Imail....error is that shows invalid username and all...what shd be the problem..is there any config in PIX..


our mail servers ips are X.X.X.100,101 , 102...mapped with static cmd, and access list for smtp port


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d.evanitsky Wed, 01/23/2002 - 10:53
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fixup smtp limits the smtp commands that the client can use to access the E-mail server........including the auth command


it seems like a trade off to me. require authentication to secure your server and prevent relaying, OR, use Cisco's fixup smtp command in your PIX



but not both



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