Hi, no clue about MS service, but it does not seem postfix related. You might want to direct this to the mailop list - https://list.mailop.org/listinfo/mailop
Josef On Wed, Oct 11, 2023 at 3:06 PM Ralf Hildebrandt via Postfix-users < postfix-users@postfix.org> wrote: > Hi! > > Since this morning, various MX hosts in *.mail.protection.outlook.com > reporting are reporting back temporary errors for us: > > Exhibit A) > > host ohri-ca.mail.protection.outlook.com[104.47.75.228] said: 452 4.5.3 > Too many recipients (AS780090) [ > YQBCAN01FT018.eop-CAN01.prod.protection.outlook.com > 2023-10-11T02:11:41.144Z 08DBC99CDEC51952] (in reply to RCPT TO command) > (for a mail with 4 recipients, in that particular case) > > Exhibit B) > > host fraport-de.mail.protection.outlook.com[52.101.73.16] said: 451 > 4.7.500 Server busy. Please try again later from [193.175.73.209]. (S77719) > [AMS0EPF0000019E.eurprd05.prod.outlook.com 2023-10-11T01:32:21.804Z > 08DBC9B278D9A989] (in reply to end of DATA command) > (for a single recipient mail) > > This is happening for multiple tenants on *.mail.protection.outlook.com > Has anybody made similar observations? According to > https://sendersupport.olc.protection.outlook.com/snds/ : "All of the > specified IPs have normal status." > > -- > Ralf Hildebrandt > Geschäftsbereich IT | Abteilung Netz | Netzwerk-Administration > Invalidenstraße 120/121 | D-10115 Berlin > Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962 > ralf.hildebra...@charite.de | https://www.charite.de > > _______________________________________________ > Postfix-users mailing list -- postfix-users@postfix.org > To unsubscribe send an email to postfix-users-le...@postfix.org >
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