Emails undeliverable on Windows Mail app and Android phone, but Outlook web works OK

[Gabby]

Hi,I can send emails from my account via the Outlook web, but when I try to use the Windows 10 Mail app or my Android phone on the same account, the emails are undeliverable because the receiving server classifies them as Spam.All 3 methods of sending an email from my account used to work, but over the past few days, it seems that neither the Mail app or my Android phone can send an email any more, even though they still receive emails OK.Can anybody help?Thanks!Gabby

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