This article outlines information related to intermittent failures when sending emails from a Microsoft email account.
I receive intermittent failures when attempting to send emails via ServiceDesk, SD-MobileLink or SD-CyberLink!Some users may be experiencing intermittent failures when attempting to send emails through a Microsoft email account.
What should I do to fix this?If you are receiving the above response while using a Microsoft-hosted email address you can try the following to achieve a resolution.
- Try using a different email provider such as MailGun or Gmail.
- Contact Microsoft to seek guidance on the sending limit cap on your account.
Help me understand why this is happening!As per the article linked, here, the sending limit on Microsoft's side is 30 emails per minute.
Additional resources:
Securing Authenticated SMTP in Exchange Online
New opt-in endpoint available for SMTP AUTH clients still needing legacy TLS