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Problems sending e-mails viw Windows Live Mail

Conversation Starter

I have tried to send two e-mails just now from via Windows Live Mail and they both just sit in the Outbox. An error message comes up " Sender domain invalid (TT420) 550 5.1.0 1 XxqiUUUgmG Server Error 550.


I have a Tiscali e-mail and have not had any notification about the new Mail Plus so have not signed up for anything. I have posted on  a thread about that but I don't think it is anything to do with that as I can send messages via the Talktalk website.


Has anybody else experienced this and is there a problem as per the error message that comes up for me?


Thank you.

Conversation Starter

Just a quick update, the messages have now gone from the Outbox and are now in Sent so seems to be back to normal.I don't want anybody wasting their time unnecessarily looking into it when it has corrected itself.