smtp;452 4.5.3 rate limit exceeded
You are sending faster than this receiver currently accepts from you. Slow down and the automatic retry will deliver the queued mail.
Provider documentation
Email provider · 4.x.x transient failure
Every SMTP 452 response on record from Rambler, with the verbatim text, the enhanced status code, a severity rating and a plain-English fix.
The action failed because the server is short on a resource, typically storage or the number of recipients it will take in one session. Sending fewer recipients per message, or simply retrying later, usually works.
smtp;452 4.5.3 rate limit exceeded
You are sending faster than this receiver currently accepts from you. Slow down and the automatic retry will deliver the queued mail.
Provider documentation
Postmaster & documentation
The action failed because the server is short on a resource, typically storage or the number of recipients it will take in one session. Sending fewer recipients per message, or simply retrying later, usually works. At Rambler, it is a temporary deferral that is retried automatically, 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.