Cannot send email in Outlook

[Captainkirk]

I have been using Outlook on my PC and the Talk Talk server on my laptop for many years. I can still send and receive from the server, but I can only receive in Outlook not send - "Error address not found" when sending test message.

Using Windows 7 with Outlook. I have a onetel.com email address

Receive pop3. mail.ontel.com - port 110

Send - smtp.talktalk.net - 25

Just stopped recently has something changed?

Anybody?

[Captainkirk]

Great info

Thanks again

Captainkirk

[Gondola]

Onetel.com email addresses are just one of the TalkTalk legacy domain addresses still supported by TalkTalk Mail. All TalkTalk Mail legacy domains must use the talktalk.net host server names. Onetel email addresses are a TalkTalk email address and the onetel email addresses remain unchanged but the mail server settings are mail.talktalk.net for incoming onetel emails and smtp.talktalk.net for outgoing onetel emails. All, exactly as shown to you in the table.

What email software have you chosen to replace your outdated Outlook email client?

[Captainkirk]

Thanks for all the info Gondola.

Under the Outlook 365 - pop3 settings - will the onetel.com address still be recognised for onetel customers. That was why it was kept orignally when the outgoing was changed to smtp.

Or wil port 995 work with "mail.onetel.com", or will TalkTalk auto redirect "onetel email addresses to talktalk.net?

There are many onetel customers out there who still use "onetel" email addresses   - TalkTalk were committed to supporting them when thy bought out Onetel

[Gondola]

That tells me you're probably using Outlook 2010 or earlier.  TalkTalk Mail does not support SPA so that is never used. Furthermore TalkTalk are disabling IMAP4 and POP3 access for any mailbox that continues to have insecure connections from any mail collection service or device software.

Using POP3 insecure port 110 will simply get your mailbox limited to webmail only access because of continued use of insecure settings. If you choose not to use secure settings then get used to using TalkTalk Mail via webmail because that will end up as your only resource if TalkTalk lock your mailbox to webmail only access.  I expect you'll be back before too long but by then it might be too late.

So cease using an outdated version of Outlook and give it a good retirement. Certainly don't let it connect to your mailbox. Use webmail via an up to date browser like Chrome, Firefox or Edge if you cannot upgrade:

Select here:  Sign in to TalkTalk Mail

Enter your full TalkTalk Mail email address and password, select Sign in.

The correct settings for an up to date version of Outlook on a supported OS are given below:

Go via the Advanced setup settings of an email profile, as in this example for Windows 10 or 11.

• Select the  Windows icon bottom left
• Select the  Settings cog icon
• Select Accounts
• Select  Email & Accounts
• Select the email account
• Select Change account or double click on the email account

At that point on your device you ought to see the Outlook setup to enter the TalkTalk Mail server settings for an IMAP secure account. In the event that you wish to set up an IMAP email account then use the below settings but enter the Incoming Port as 993.

Supported Outlook 16 - Outlook 365 settings for a POP3 account are:

Account Type	POP3 secure
Username	Full TalkTalk email address
Password	TalkTalk email password
Incoming mail server	mail.talktalk.net
Incoming Port (POP3)	995
Incoming Connection Security	SSL/TLS
Outgoing mail server	smtp.talktalk.net
Outgoing Port	587
Outgoing Connection Security	STARTTLS
My Outgoing Server Requires Authentication	Yes
Authentication Method	Normal Password (Not SPA)

If you want help in upgrading then the upgrade path is to a supported OS, Windows 10 or 11 and Windows Mail or a paid upgrade to Outlook 2016 - Outlook 365 or a free upgrade to Thunderbird (still supported on Windows 7) or BlueMail desktop email app or other software of your choice.

I will help you upgrade. But I cannot do anything with any Outlook software that does not support secure encryption to TLS 1.2 that is the minimum SSL/TLS encryption protocol required for TalkTalk Mail.

[Captainkirk]

Thanks Gondola - disabled port 25 is the answer.

It would not work by just changing the port to 587 - I had to acess the "outgoing server" tab, in More Settings and tick " My outgoing server smtp requires authentication" 

Complete User Name and Password

and tick "Log on requires Secure Password Authentication (SPA)"

I am now back in business using port 110 for incoming pop3 onetel mail and port 587 for outgoing smtp talktalk mail.

Captainkirk

[Gondola]

Port 25 is now blocked to stop the use of insecure mail.

What version of Outlook are you using on Windows 7? Windows 7 is now a deprecated OS so I'm guessing Outlook is possibly also not able to use the STARTTLS outgoing command with port 587 and outgoing server authentication plus login using the full Onetel email address and password?