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I m using Windows 10 and use Thunderbird for my email. I m currently on icloud email but have this problem. I can received emails but unable to sent emails.

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I m using Windows 10 and use Thunderbird for my email. I m currently on icloud email but have this problem. I can received emails but unable to sent emails. But when I use my gmail, all is ok, sent & received....

I m using Windows 10 and use Thunderbird for my email. I m currently on icloud email but have this problem. I can received emails but unable to sent emails. But when I use my gmail, all is ok, sent & received....

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