SOLVED – Yandex said: 550 Rejected by country code fliter (in reply to MAIL FROM command)

Merhaba Değerli Yandex Kullanıcıları,

Günün birinde aşağıdaki gibi bir red e-posta (said: 550
Rejected by country code fliter (in reply to MAIL FROM command)) hatasıyla karşılaşırsanız;

If you meet with this error (said: 550
Rejected by country code fliter (in reply to MAIL FROM command)). You must apply the following solution.

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