Hi Aban, Thanks for flagging this.
I'm from Brevo's Deliverability team. You're right that dmarc.brevo.com is experiencing connectivity issues on port 25. The service is backed by an older infrastructure that we are in the process of migrating to a new setup, which should be fully live within the coming days. The current endpoint is operational but has known reliability issues, which is consistent with what you're observing. In the meantime, if your MTAs are queuing DSNs destined for [email protected], they should retry successfully. The service is accepting connections, just intermittently. I'll follow up on this thread once the migration is complete. Apologies for the inconvenience. Best regards, Hichem - Deliverability Team Le sam. 23 mai 2026 à 09:35, Aban Dokht via mailop <[email protected]> a écrit : > Hello list, > > Is anyone from Brevo on this list? > > We are currently receiving a large number of DSNs like the following: > > > [email protected]: connect to dmarc.brevo.com [35.240.42.69]:25: > > connection timed out > > This occurs for multiple domains whose DMARC records point to Brevo, for > example: > > > v=DMARC1; ...; rua=mailto:[email protected],... > > From several independent hosts, we are unable to establish a connection > to dmarc.brevo.com on port 25. This suggests a potential issue with the > MX/service availability or connectivity on that endpoint. > > Has anyone else observed this, or can someone from Brevo confirm whether > this service is currently operational as expected? > > Kind regards, > Aban > > > -- > Aban Dokht [email protected] > ------------------------------------------------------------------ > > _______________________________________________ > mailop mailing list > [email protected] > https://list.mailop.org/listinfo/mailop > -- Hichem ELBOUGHDIRI Tel : +33 6 14 83 35 51
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