Gw4.1a with GW5.5EP - error: TCP/IP File Transmission Failure Packet

[MRobare]

Error: TCP/IP File Transmission Failure Packet (7)

We have a 5 site WAN (hub and spoke with the NY office as the Hub).
We originally where all GW4.1a. Now we started migrating/upgrading to GW5.5EP and began with the NY office. Within one NY domain we have 3 PO's. We created a new GW5 domain within the GW4 system and then promoted it to be Primary. Then we created one GW5 PO and went on from there.

Everything seemed fine and all the links look OK. But, since the start of this I've found that people have complained that their messages are not getting delievered, particularly to the new GW5 SMTP gateway within NY from a GW4 PO also within NY.

I found that I get File Transmission Failure errors on large messages. Usually anything over 1Mb and that they get queued up in the MSHold directory on the GW4.1a side.

I have also found the same thing happening at one remote site that is still on GW4.1a
and they are getting the errors going from GW4 to GW4, not just to the SMTP gateway. They can receive all EMails (apparently) but get the above errors when sending to any other site on the WAN, again with large files over 1Mb.

Any ideas out there???

Thank you,
Mike R.

 

[rjs]

I've had similar problems with the 4.1 SMTP running on older file servers (NetWare 3.1x). There is a 4.1 SMTP patch (smtp4.exe I believe) on Novell's site. I also had to change some settings at the server:
SET USE SPECIFIED MTU = ON
SET MAXIMUM INTERFACE MTU=1500
SET ALWAYS ALLOW IP FRAGMENTATION=ON
That fixed most, but not all of the problems. I finally had to set the 4.1 SMTP to relay all outbound traffic through a local the GWIA. Not great but it now works until I get them all upgraded to 5.5.

 

[TheBoySmith]

This error tends to be networking problems. The settings above will help the system but maybe there is a slow/bad link somewhere in your WAN and it has appeared just as you started this migrate. Maybe leave some pings running for a day or so and see if you lose any packets?