"Domain is prohibited to send mail because of email abuse." How else can I troubleshoot this?
An error occurred while sending mail. The mail server responded: Domain lunacleaning.ro is prohibited to send mail because of email abuse.. Please check the message recipient "patricia.p.office@gmail.com" and try again.
Mail provider: ROHOST ISP: Telekom Romania Firewall version: Windows firewall with advanced security Thunderbird version: Mozilla Thunderbird 60.5.0 (32-bit) OS: Windows 7 Ultimate x64 based PC Antivirus: ESET NOD32 12.0.31.0
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Duplicated here https://support.mozilla.org/en-US/questions/1250309