Email provider · 5.x.x permanent failure
Every SMTP 554 response on record from Rambler, with the verbatim text, the enhanced status code, a severity rating and a plain-English fix.
The transaction failed with no more specific reason offered. In practice the receiver is saying the message is unwanted: a spam verdict, a blocklisted IP, or a policy rejection. The accompanying text is where the detail is.
smtp;554 5.7.1 Spam message rejected; If this is not spam contact abuse
The receiver's spam filter scored the message above its rejection threshold. Review the content and links, build sending reputation gradually, and only mail people who asked to hear from you.
Provider documentation
Postmaster & documentation
The transaction failed with no more specific reason offered. In practice the receiver is saying the message is unwanted: a spam verdict, a blocklisted IP, or a policy rejection. The accompanying text is where the detail is. At Rambler, it is a permanent rejection, and the specific reason is in the enhanced status code and message text of each response below.
Match your bounce text to one of the responses below and follow its guidance. Recipient-side wording means fix the address. Authentication or reputation wording (SPF, DKIM, DMARC, blocklist) means fix your sending setup, and check Rambler's postmaster documentation.
