New Email Throttling Error Message

Sal Collaziano · 2026-05-01T02:42:02+00:00

Is this something new with XF 2.2? Swift_TransportException: Email to email@email.com failed: Expected response code 250 but got code "454", with message "454 Throttling failure: Maximum SigV2 SMTP sending rate exceeded. " I'm receiving this...

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Sal Collaziano

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Apr 30, 2026
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Is this something new with XF 2.2?

Swift_TransportException: Email to [email protected] failed: Expected response code 250 but got code "454", with message "454 Throttling failure: Maximum SigV2 SMTP sending rate exceeded. "

I'm receiving this on various installations and I've never seen it until recently...

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