5.7.1Info
smtp;540 5.7.1 <example@rambler.ru>: recipient address rejected: Inactive
Rambler says this mailbox is inactive. Treat it as a hard bounce and suppress the address.
SMTP 540
Permanent (5xx)
The transaction failed permanently. The server will not try to send the message again. The email was returned to you likely because the intended recipient's account has been suspended or deactivated.
Email providers
Rambler
2 responses for SMTP 540
5.7.1-2Info
smtp;540 5.7.1 <example@rambler.ru>: recipient address rejected: Blocked
Rambler blocked this recipient address. Suppress it unless the recipient confirms they want mail and the block is lifted.
Response catalog adapted from the MIT-licensed SMTP Field Manual by ActiveCampaign / Postmark.