IIS Smtp Relay using Smarthost Share on Facebook Post on reddit Tweet on Twitter Share on LinkedIn Home › Forums › Messaging Software › Exchange 2007 / 2010 / 2013 › IIS Smtp Relay using Smarthost This topic has 4 replies, 3 voices, and was last updated 12 years, 11 months ago by ivanpudic. Viewing 1 post (of 1 total) Author Posts ivanpudicMember Oct 08, 2007 at 8:19 am #128154 Greetings, I currently have this configuration: 4 servers, each 1 role from exchange 2007 mailbox, hub, client access, edge i added an extra server with 2003 r2 x64 standard so i could install GFI MailSecurity and GFI MailEssentials. on this server i configured mail relay for our domain. Everything works fine when i send a mail from the domain (outlook and owa) put when i replay from an external domain, the message never comes thru and i receive on the external account: authentication failed i’ve struggled many days to figure this out and i’ve came at the end of the line! i’ve tried removing the edge subscription and working only with the iis smtp relay but it’s the same effect! help would be really appreciated!! thanks in advance! Ivan Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic.