What have I done wrong? Suddenly ALL IMAP-connections to my company's mail server fail

[Correctament]

I work from home 24/7.
Today, after starting up my computer and opening my mail client this morning, I am suddenly faced with a problem I never had before: Login to server mail.[company].com with username [economy@company.com] failed.
My colleagues do not have this problem, so it's nothing server-side, rather it's client-side or local on either my machine or router.

Only thing I have changed network-wise after working yesterday was I enabled the 5GHz-radio on my Router through the LuCi-interface. Other than that, I haven't really dabbled with ANY connection settings, Network settings or the like.
Which leads me into thinking my router is doing something.

I desperately need your help in troubleshooting this problem and your great minds on how to solve it.

Best regards,
Correctament

[krazeh]

@Correctament

Login to server mail.[company].com with username [economy@company.com] failed

Not to point out the obvious, but that sounds a lot like there's an issue with your username/password (or the server). Have you spoken to your IT department to check everything is fine at their end?

A local network issue would be far more likely to prevent you accessing the server at all, rather than being able to access it but not login.

[Correctament]

Yes, I have troubleshooted all morning. Got the current password, server adress, ports, yada yada. from my web admin.

I investigated further:

1. I configured my email client on the phone instead with the very same settings. It worked fine.
2. I then used my phone's Share Network-service. I connected my computer to the network. Works like normal. No connectivity issue, mails are sent/received normally again.

So there must be a problem with the router. Something in the software must block the connection in/out somehow?
How do I move forward here?

[frollic]

there are only a couple of things you're not sharing with your colleagues

router
ISP
and laptop

is there perhaps a VPN involved someplace ?
try sharing internet from your cell phone, does it work if you use the phones wifi hot spot ?

[lleachii]

@Correctament

How do I move forward here?

• Reset router to default (since we know nothing about it i.e. configs)
• Upon reboot, try again

And as noted, there are additional differences in your connection, aside from the router.

@frollic

is there perhaps a VPN involved someplace ?

Good question!

[Correctament]

I have used VPN before (personally) but it's not mandated by my company. Company is VPN-less.

[Correctament]

Yes; I think I did this right when you replied: What have I done wrong? Suddenly ALL IMAP-connections to my company's mail server fail - #2 by krazeh

[Correctament]

By resetting, do you mean going back to factory default software? The router is a Xiaomi, I rather not use their framework, I'd rather use OpenWRT of course

Or is there a built-in way to do this int he LuCi interface? If so, I haven't found it yet.

[lleachii]

@Correctament

By resetting, do you mean going back to factory default software?

No.

@Correctament

I'd rather use OpenWRT of course

Or is there a built-in way to do this int he LuCi interface?

Yes.

See:

Failsafe mode, factory reset, and recovery mode

[krazeh]

Have you spoken with your company's IT department? I'd really suggest doing that before you start resetting routers etc.

[lleachii]

I agree with @krazeh. From your description, you did nothing to your your device before the problem arose. Is that accurate?

Why do you believe the router suddenly developed an issue?

[Correctament]

There is no IT department. My company is a small business consisting of 5 people, myself included.
They have recommended I reboot/reset the router. So I'll try to do that, like how you recommended.

It has been stuck like this for a while now. How long does it usually take? '
Do I dare refresh the page?

[lleachii]

@Correctament

There is no IT department.

@Correctament

They have recommended I reboot/reset the router.

But there's no IT staff - yet they gave IT advice?

@Correctament

How long does it usually take?

• You should expect to loose connection as the device reboots
• If you were on WiFi, you'll need to set that up again via Ethernet cable

@Correctament

Do I dare refresh the page?

Sure, why not?

[trendy]

After reset, the lan intrface will have 192.168.1.1 address. In case you had changed that you'll need to renew DHCP lease.

[Correctament]

I just want to thank you all for participating with troubleshooting and solutions.
Restoration did the trick. EVERYTHING works now!

Adios amigos!