MTU change, outgoing.verizon.net, northern Virginia

jonjgc1

My setup, after working for several years, stopped delivering outgoing mail.

I traced it to a change in the maximum packet size that outgoing.verizon.net (o.v.n) will accept.

I had been using an MTU of 1500 in my router but had to drop this to 1476 before o.v.n would accept my emails.

I learned of an similar incident earlier this year in the Dallas,TX area.

http://chrisbenard.net/2014/02/25/How-to-Fix-Verizon-FiOS-Problem-Connecting-to-Websites/

There the problem was determined, by Verizon, to be due to misconfiguration of two "uplink" machines

near Dallas. Thus I suspect my problem is localized to a limited region in my Northern Virginia area.

Two friends in my region encountered the same problem and the same band-aid fix worked for them.

I hope Verizon tech follow this forum and can investigate and remediate.

Jon

drmikehenry

I live in Severn, MD. I ran into this same problem and used the same work-around. Unfortunately, the work-around reduced the MTU for all Internet-bound traffic, not just traffic to outbound.verizon.net, so I, too, would find it beneficial if the MTU for outbound.verizon.net could be increased to the standard 1500 bytes.