SM v 13.x latest build.
Off lately customers are complaining about send/receive failure with stand error of outlook saying something like "if further problem persists pls contact your ISP / System administrator"
Net connection is good as other mails in outlook gets synced properly, but SM related ID gets failed, if i try to reboot the net router then it works fine for a while again this issue comes up.
though this points outlook pst file issue too but in mycase pst is within 1GB and even tried repairing it with scanpst file.
Other option i see is to increase the wait period but what could be other issue here ?