This problem came up just about 5 weeks ago, it was working perfectly fine before. I've check possible causes with solution. Its hosted locally, while the dns detailed is managed remotely. I got this failure notice from exchg outlook: Delivery has failed to these recipients or distribution lists: kayuzz@hotmail.com An error occurred while trying to deliver this message to the recipient's e-mail address. Microsoft Exchange will not try to redeliver this message for you. Please try resending this message, or provide the following diagnostic text to your system administrator. The following organization rejected your message: SNT0-MC2-F19.Snt0.hotmail.com. And I got this failure notice when i tried to send from yahoo: <kayode.fagbemi@oacngr.com>: Message expired for domain oacngr.com. Remote host said: 452 4.3.1 Insufficient system resources [MAIL_FROM] --- Below this line is a copy of the message. Received: from [98.139.212.149] by nm21.bullet.mail.bf1.yahoo.com with NNFMP; 01 Aug 2012 10:08:28 -0000 Received: from [98.139.212.202] by tm6.bullet.mail.bf1.yahoo.com with NNFMP; 01 Aug 2012 10:08:28 -0000 Received: from [127.0.0.1] by omp1011.mail.bf1.yahoo.com with NNFMP; 01 Aug 2012 10:08:28 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 546824.11023.bm@omp1011.mail.bf1.yahoo.com Received: (qmail 19001 invoked by uid 60001); 1 Aug 2012 10:08:28 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s1024; t=1343815707; bh=jRSTQVs2A1PIuRicd5v0zwHI1AjDMW8q/euNAN+1DR8=; h=X-YMail-OSG:Received:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=w9ruTSwiDKeSRSxmdmKDzG9KVrJMxwPP5myx+K3WZZqM6UMU4A8wpS3oxnUiL6hwOLm7do1daTFVUs6Va18Puxs9TB+cSxaK+TMDw8Orc+a7IIZOlegHy8IMDrpRJQe387kCzFhKMEss+9NjYok+rInpxz0JXE57n0ZCwCazNwk= DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type;

Please confirm if you have a reverse ptr record for you mail server. James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com

Please confirm if you have a reverse ptr record for you mail server. James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com

On Wed, 15 Aug 2012 10:23:02 +0000, Kayuzz wrote: > > >This problem came up just about 5 weeks ago, it was working perfectly fine before. I've check possible causes with solution. Its hosted locally, while the dns detailed is managed remotely. > >I got this failure notice from exchg outlook: > > > >Delivery has failed to these recipients or distribution lists: > >kayuzz@hotmail.com An error occurred while trying to deliver this message to the recipient's e-mail address. Microsoft Exchange will not try to redeliver this message for you. Please try resending this message, or provide the following diagnostic text to your system administrator. > >The following organization rejected your message: SNT0-MC2-F19.Snt0.hotmail.com. > > > >And I got this failure notice when i tried to send from yahoo: > > > ><kayode.fagbemi@oacngr.com>: Message expired for domain oacngr.com. Remote host said: 452 4.3.1 Insufficient system resources [MAIL_FROM] --- Below this line is a copy of the message. Received: from [98.139.212.149] by nm21.bullet.mail.bf1.yahoo.com with NNFMP; 01 Aug 2012 10:08:28 -0000 Received: from [98.139.212.202] by tm6.bullet.mail.bf1.yahoo.com with NNFMP; 01 Aug 2012 10:08:28 -0000 Received: from [127.0.0.1] by omp1011.mail.bf1.yahoo.com with NNFMP; 01 Aug 2012 10:08:28 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 546824.11023.bm@omp1011.mail.bf1.yahoo.com Received: (qmail 19001 invoked by uid 60001); 1 Aug 2012 10:08:28 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s1024; t=1343815707; bh=jRSTQVs2A1PIuRicd5v0zwHI1AjDMW8q/euNAN+1DR8=; h=X-YMail-OSG:Received:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; >b=w9ruTSwiDKeSRSxmdmKDzG9KVrJMxwPP5myx+K3WZZqM6UMU4A8wpS3oxnUiL6hwOLm7do1daTFVUs6Va18Puxs9TB+cSxaK+TMDw8Orc+a7IIZOlegHy8IMDrpRJQe387kCzFhKMEss+9NjYok+rInpxz0JXE57n0ZCwCazNwk= DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; See if these are any help: http://exchangepedia.com/2007/03/exchange-server-2007-transport-452-4-3-1-insufficient-system-resources.html http://blogs.msdn.com/b/echarran/archive/2007/04/30/4-3-1-insufficient-system-resources-in-exchange-server-2007.aspx --- Rich Matheisen MCSE+I, Exchange MVP --- Rich Matheisen MCSE+I, Exchange MVP

hi, Please first check the back pressure. If you have anyupdate, please post here. thanks,CastinLu TechNet Community Support

hi, Please first check the back pressure. If you have anyupdate, please post here. thanks,CastinLu TechNet Community Support

Thanks guys, the issue had been resolved, the exchg server was actually running out of space. Kayode.Kayman