Can receive emails but not send - tricky description so please read text

[matty1961]

Well... let's see what happens when this is resolved, because it's not helping.

[licquorice]

If you had no PPP session, nothing would work.

[gg30340]

If all your Outlook.com email accounts work with Thunderbird and when using Webmail and only three out of the four work using the Outlook email client it would appear to be a problem with the set up of your Outlook email account in the Outlook email client, most likely a problem with the authentication of the errant email account on the outgoing Outlook servers.

I fail to see how it can in any way be down to moving from BT ADSL to FTTP. The delivery method of broadband is irrrelevant and if it in some strange unknow way was, why would it only select only one of your email accounts and not all of them and why would it not affect the accounts when using Thunderbird.

Try deleting the account from Outlook email client and restart your computer then set the account up again but this time set it up manually and enter all the settings using the correct settings supplied by Microsoft for the client.

[matty1961]

Update... I finally managed to get an Openreach engineer round, and he checked as much as he could. Put a "meter" on the fibre optic and it measured -18.46 db. So everything appears to work normally, so it's not the cable.

My main computer was built by me, and I keep it updated. I also bouight a Geekom A5 mini-pc. Put a new NVMe drive in the A5 and installed the latest version of Windows 11. To cut a long story short. the A5 hasn't missed a beat. Sends emails through Outlook classic every time. My self-built computer still doesn't.

So I'm now thinking hardware?

[gg30340]

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@matty1961wrote:
So I'm now thinking hardware?

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..... or how your account is set up in Outlook on your computer!

If it was hardware how does it only affect one email account of many and why only in Outlook.

[matty1961]

I have absolutely no idea. The whole problem is crazy; it shouldn't happen like that. Never encountered anything this confusing. It doesn't make any sense at all.

[gg30340]

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@matty1961wrote:

I have absolutely no idea. The whole problem is crazy; it shouldn't happen like that. Never encountered anything this confusing. It doesn't make any sense at all.

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It makes perfect sense if you pay attention to what has already been posted. The problem is with Outlook.

I will now bow out of your thread.

[matty1961 · Accepted solution]

You remember I posted about being unable to send emails from a specific account, well, I think I've resolved the issue.

Bought myself a USB wifi dongle. Disabled the onboard wifi and LAN, and plugged it in. To cut a long story short, sending and receiving emails, especially from the specific email account, has never missed a beat.

This morning I had further thoughts, and have been aware that the screw-in socket on my wifi antenna have been loose for a while.

I found some old wifi antennas and screwed them on. TA DAH!!!!!

Once again, it's never missed a beat (YET), and I'm getting a download speed of 540 Mbps on 5G wifi.

So it looks like it came down to a dodgy wifi antenna connection.

How very strange!

[gg30340]

If the problem has been resolved it is a coincidence that it happened when you tightened up your wifi aerial. There is no way that a faulty wifi aerial could differentiate between allowing all your Outlook email accounts to send emails except one.

It is more likely that your errant email account is now accessing a different Outlook server which is allowing the email through.

Any way glad you have it sorted.