smtp auth

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Microsoft Delays Retirement of Basic Authentication for SMTP AUTH
Microsoft has delayed the retirement of basic authentication for the SMTP AUTH client submissions protocol to 2027 or beyond. New tenants will be the first to be blocked and Microsoft will disable basic authentication for SMTP AUTH in a way that existing tenants can reenable the protocol. Eventually, we’ll get a date for final retirement sometime in 2027. These things take time! https://office365itpros.com/2026/01/29/smtp-auth-basic-retirement/
TonyRedmond
Feb 02, 2026 Place Exchange
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How do I enabled smtp auth for a mailbox in exchange online
Hi All, I am trying to enable SMTP auth for my exchange server. I have followed the instruction given here https://docs.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/authenticated-client-smtp-submission to enable a specific mailbox to have SMTP Auth. But I am still getting a timeout error when I am trying to test the config via smtper.net I also tried writing a simple c# code and test getting the same issue. Here are the config that I used Host: smtp.office365.com port: 587 using secure connection and authentication using the username and password of the user account Please help Thanks Tiklu
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tiklu ganguly
Dec 16, 2021 Place Exchange
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