Hi Does it need to be on the server only? because I saw in one of the guides something related to MTU sizes but it said that it had to be done in every machine that traversed ISA. Thanks. ----- Original Message ----- From: John Tolmachoff To: [ISAserver.org Discussion List] Sent: Thursday, February 06, 2003 2:34 PM Subject: [isalist] RE: Mail problems with ISA http://www.ISAserver.org That is the same modem Ameritech is using. Try changing the MTU size to 1408 on ISA and see what happens. John Tolmachoff MCSE, CSSA IT Manager, Network Engineer RelianceSoft, Inc. Fullerton, CA 92835 www.reliancesoft.com -----Original Message----- From: redex [mailto:soporte@xxxxxxxxxxxx] Sent: Thursday, February 06, 2003 12:24 PM To: [ISAserver.org Discussion List] Subject: [isalist] RE: Mail problems with ISA http://www.ISAserver.org Thanks for the reply John. It is a Mexican DSL Provider, it uses ENTERNET Software by Efficient Networks, The modem is a SPEEDSTREAM 5360. ----- Original Message ----- From: John Tolmachoff To: [ISAserver.org Discussion List] Sent: Wednesday, February 05, 2003 10:26 AM Subject: [isalist] RE: Mail problems with ISA http://www.ISAserver.org Are you using PPPoE? Is this by chance a Ameritech or SBC DSL line? John Tolmachoff MCSE, CSSA IT Manager, Network Engineer RelianceSoft, Inc. Fullerton, CA 92835 www.reliancesoft.com -----Original Message----- From: redex [mailto:soporte@xxxxxxxxxxxx] Sent: Tuesday, February 04, 2003 4:17 PM To: [ISAserver.org Discussion List] Subject: [isalist] Mail problems with ISA http://www.ISAserver.org HI I am having some more issues with ISA I checked the order of the network adapter cards now the Internal Network is listed as first and am able to create users. Now the problem is I can't send or receive email in Outlook but I am able to do so in the ISA Server Machine why? I have a server setup with SBS and DSL Internet connection with a SPEEDSTREAM 5360 so under "Network and DialUp connections I have 3 network adapters One for the Internal Network, the other one is the External Network and the third is a virtual network card created by the software. In the guides on isaserver.org it explains about setting up a dial-up connection and use it to automatically dial at every user request but how do I do that ? 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