ok ladies and gents.....
here is what we got... my neighbor's email stopped working (incoming worked, outgoing failed) on july 1, after talking with ISP (Suddenlink) for a while, and confirming all mail settings, they DO say they made a change in their systems on that day.
my neighbors have a website and use that domain for email, upon talking with suddenlink, suddenlink says they HAVE to use their smtp servers to stay within policy/agreement whatever.....thats fine......
so we make the smtp change, by now its a few days later, and their inbox is growing no doubt. after we put the settings in, ougoing works, but INCOMING doesnt. note we're still using the domain incoming mail. the error we are getting is something like, "incoming pop3 server not found......0x00010842 " i might have the error code wrong....but anyway.....
after trying just about everything i can think of, plus a few that all the forums thought of, after all that didnt work, i got the idea to try without the router. after plugged straight into the cable modem, email worked fine, right off the bat.
so i plugged the router back up and started looking around in the config, and made sure the right ports were open, the router model is Network Anywhere NR041, its kinda old, and crappy.....and i dont know what else to try....
but i have one more hunch, since the chance of something in the router initially causing this mess is extremely low, could it be a change from Suddenlink started the ball rolling. like if they upped the MTU they used, and it finally exceeded the most our router could handle? ive yet to go test the max MTU the router can take, but i just thought i'd ask you guys first and see what your thoughts where. could it be since the days went by, and the inbox grew and grew, and since these guys checked their inbox daily, or even hourly, could it be maybe that this router never had to ask the pop server for a packet larger than its max MTU threshold? i dont know for sure, but just wondering why the sudden change. or....maybe suddenlink seen that they were using an external smtp, so they blocked the activity, this caused the inbox to grow, then by the time the outgoing mail server was changed to use suddenlink's smtp server, the inbox on the pop server was large enough to make the router deny incoming packets larger than its MTU threshold. Suddenlink does use the max 1472 +28, if your sharing your connection, then subtract 4. which comes to 1468 + 28 +4 = 1500 MTU. have i got this right or wrong?
but definately our problem lies within the router, i might just have to go buy a new one and be done with it, but if i do, and the same thing happens, i will be back to square one unless i can find the problem for sure right now.
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