Sending' reported error (0x80042109): 'Outlook cannot connect to your outoing (SMTP) e-mail server.

[NIM]

I've received the following error for all my accounts on a fresh installation of Outlook 2010.

Sending' reported error (0x80042109): 'Outlook cannot connect to your outoing (SMTP) e-mail server. If you continue to receive this message, contact your server administrator or Internet service provider (ISP).'

Solution:

I've noticed that Microsoft has changed the default SMTP port in Outlook 2010 from 25 to 587 as you can see in the picture below.

So, if your ISP's SMTP server does not allow port 587, you won't be able to send e-mails until you change the SMTP port to 25.

[Guest]

seems that there is a lot of problems in Office 2010

but it's still beta i hope it would be bug-free in the final version

[NIM]

seems that there is a lot of problems in Office 2010

but it's still beta i hope it would be bug-free in the final version

This actually isn't a bug as there are numerous ISP's who do allow SMTP port 587, but it could be painful and confusing for a lot of Microsoft Outlook users.

Useful info on internet protocols here.