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I can't send an e-mail from thunderbird, it was working well, suddenly it says the following message:An error occurred while sending mail. The mail server respo

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i can't send an e-mail from thunderbird, it was working well though , suddenly it says the following message:An error occurred while sending mail. The mail server responded An error occurred while sending mail. The mail server responded: (Alis-MacBook-Air.local) [46.138.187.135]:51054 is currently not permitted OR i have changed the port from 587 to 465 but still cannot send e-mail, it keep sending and sending for 5 minutes and respond is time out?

i can't send an e-mail from thunderbird, it was working well though , suddenly it says the following message:An error occurred while sending mail. The mail server responded An error occurred while sending mail. The mail server responded: (Alis-MacBook-Air.local) [46.138.187.135]:51054 is currently not permitted OR i have changed the port from 587 to 465 but still cannot send e-mail, it keep sending and sending for 5 minutes and respond is time out?

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