Mike: the domain is MY domain. This has happened while sending to multiple external domains [possible 5 or 6] (two of which perform zero filtering). The funny thing is that when employee #1 was sending to external_Recipient_XYZ and getting it bounced, Employee #2 was able to successfully send to external-Recipient_XYZ. Then several hours later employee #1 can successfully send mail to the same recipient again.
Joseph Danielsen, CSBS, MCSA-2003, MCSA-2000 (Messaging), MCP Network Blade Inc. 49 Marcy Street Somerset, NJ 08873 732-213-0600 www.networkblade.com Ask me why a Microsoft Certified Small Business Specialist is best for your company -----Original Message----- From: Micheal Espinola Jr [mailto:[EMAIL PROTECTED] Posted At: Monday, June 23, 2008 1:45 PM Posted To: Exchange Conversation: Mail Server Requires Authentication Bounce Message Subject: Re: Mail Server Requires Authentication Bounce Message mail.domain.com #5.5.0 smtp;503 Is mail.domain.com your domain or the final-recipient domain? How many external domains does this problem occur with. Is it always the same ones? On Mon, Jun 23, 2008 at 11:19 AM, ExchList <[EMAIL PROTECTED]> wrote: > Oh my gosh am I about to hang myself over this problem; with what seems to > be a simple issue is evading me for a solution. > > Exchange 2003 SP2, Windows 2003 R2 (patched) > > > > A few times per week, users will report that when sending to 'one > particular' email address - it gets bounced with the message below. Other > outbound messages from the client at that time will go through. And at the > same time if another employee sends an email to the same recipient it will > go through. Each employee that experiences this bounce message is sending > to a different recipient/domain; and they don't always get bounced. > > > > My research has revealed a number of old posts with the same problem but do > not provide any solutions. > > > > I case of beer for the one who solves this for me - so I can sleep at night. > PLEASE HELP ME! > > > > mail.domain.com #5.5.0 smtp;503 This mail server requires authentication > when attempting to send to a non-local e-mail address. Please check your > mail client settings or contact your administrator to verify that the domain > or address is defined for this server. > > > > Joseph Danielsen, CSBS, MCSA-2003, MCSA-2000, MCP > > Network Blade Inc. > > 49 Marcy Street > > Somerset, NJ 08873 > > 732-213-0600 > > www.networkblade.com > > > > -- ME2 ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ ~ http://www.sunbeltsoftware.com/Ninja ~ ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ ~ http://www.sunbeltsoftware.com/Ninja ~
