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Access denied

SMTP Error (550): Failed to set sender (Access denied – Invalid HELO name (See RFC2821 4.1.3))

August 31, 2020arstech Leave a Comment
Access denied - Invalid HELO

In this article i will show how to fix error in VestaCP: An error occurred!SMTP Error (550): Failed to set sender “xxx.zzz” (Access denied – Invalid HELO name (See RFC2821 4.1.3)). The problem happens when you try to send email… Continue Reading →

CentOS, Linux, Ubuntu Access denied, Invalid HELO, roundcube, SMTP Error (550), vestacp

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