Tüm maillerde "invoice" mi yazıyor? Örnek "invoice xx - invoice yy" gibi değişiyorsa sorun yaşamazsınız.
Mailrelay üzerinden gelen yanıt bu şekilde.
Hi,
On further checking the reported emails, the "From" header display name has matched with some spam patterns at our end and these spam patterns are commonly used by abusers/spammers, hence resulting in the reported CS block from our end. In this case, to resolve the issue, if possible, I request you modify the mentioned emails from Header Display name to a simpler one, as shown below.
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fr='Invoice muhasebe@poslukirtasiye.com'
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Gönderilen örnek mail de bu şekilde.