Globalnet email

[#1]

Hi all.

Today my forced move to BT happened, even though I was quite happy with Globalnet/plusnet.  Thankfully, I’m still receiving email on my Globalnet email address through webmail and outlook.  However, I’m unable to send or reply to any.  It says to all email addresses that it’s not a valid email address and rejected by the server.  

Do I need different settings? Please advise.  I’m not techy so please keep it simple!  Thanks.  

[#2]

Typically the answer would have been use a Greenby SMTP server like mail.enmail.co ( for send / reply ) 
or try via Greenby webmail : https://webmail.greenby.com/

But here I don't know if this applies given the Globalnet email server : mail.globalnet.co.uk
is hosted by Plusnet, suggesting Globalnet emails are not migrated to Greenby.

It might be worth archiving or printing important emails now whilst you can see them.

[#3]

Greenby hasn't moved yet, so all will continue as normal except for sending (see the previous reply).

[#4]

But I still can’t send any mail so it’s not the same.