Terry Bennett wrote:
> Many thanks for the advice, but I haven't the first idea what any of that
> means!
>
> Could you tell me how please?
>
> Sorry ... bit of a novice at Outlook!
>
> Why would it suddenly have changed?
Do you know how to look at the e-mail account that is defined in
Outlook? If so, go to More Settings. The SMTP server is the Outgoing
Server.
Some reasons for changes:
- You [left] configured Automatic Updates to automatically download and
install updates from Microsoft (rather than just notify you). That
means you permit Microsoft to change the state of your host whenever
they feel like it.
- You installed new software.
- You enabled e-mail scanning in some security product (anti-virus,
anti-malware, HIPS, firewall, etc). It did a program update and now
interferes with your e-mail client sufficiently enough to cause the
problem.
- Your e-mail provider decides to improve their security by requiring
off-domain users to qualify that they have permission to use their
resources. E-mail requires cooperation at both ends (client and
server). Just because your end didn't change doesn't means their
cannot.
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