Smells like this: http://www.ibiblio.org/harris/500milemail.html
ryan -- D. Ryan Spott | Iron Goat Networks, llc broadband | telco | colo | community PO Box 1232 / 603 W. Stevens Sultan, WA 98284 360-799-0552 | gtalk:rsp...@irongoat.net > On Oct 30, 2014, at 17:58, Bill Prince via Af <af@afmug.com> wrote: > > > This is a bizarre set of symptoms, and I really don't know what is going on. > So I will articulate the facts, and maybe one of you can tell me what might > be wrong. > > We have a business subscriber that occupies several buildings. The buildings > are separated by enough distance that we have to interconnect by means other > than vanilla ethernet. > > Our service is delivered to their main office. Our SM is installed there > (PMP450), plus a Mikrotik router on ROS 5.26. The Mikrotik manages 4 VLANs; > 1 business VLAN, which is bridged to the main subnet in the main office. The > other 3 VLANs are guest VLANs; each on their own (private) subnet. > > All the computers, etc. work fine in the main office. > > The main office is connected to the "guest building" with a VDSL modem (~~ > 800' phone line between buildings). Not much occurs in the guest building; > it has a couple of WiFi APs for the guests. > > In the guest building, we've installed an RB260GS switch. It divides the > various ports out to 4 different VLANs. A couple ports are the "business > VLAN", plus 3 different "guest VLANs". The SFP port on the RB260GS is used > to connect to the "satellite office" another couple hundred yards beyond the > guest building. The SFP port is on the business VLAN. > > At the satellite office, they have 2 computers. Everything on the 2 > computers in the satellite office seems to work just fine. Web browsing, > streaming youtube, etc. > > However, when they run Outlook, "some" email doesn't go to the destination. > As far as we can tell, it gets to their off-site SMTP server (Globat), but > some of it doesn't ever reach its destination. If they use their web-based > email, the email works every time. Also, the POP part of the email works just > like you'd expect. > > Today, we moved one of the computers back to the main office, and surprise, > surprise, Outlook starts working just like it's supposed to. > > We've run extended ping tests between the satellite office and the main > office, and there is no break in the link. It seems solid. So where/how is > the SMTP part of email breaking? > > What tests can I run to figure this out? > > > -- > bp >
