Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Cannot Send email - SMTP error for Office 365

  • 1 reply
  • 1 has this problem
  • 13 views
  • Last reply by Matt

DaegLeung
DaegLeung
more options

I have configured the email account correctly, following the office 365 suggestions and set the port to 587, security set at STARTTLS, yet it gets me this error.

Sending of the message failed. An error occurred while sending mail: Outgoing server (SMTP) smtp.office365.com is unknown. The server may be incorrectly configured. Please verify that your Outgoing server (SMTP) settings are correct and try again.

The funny thing was this happens from time to time, sometimes I could send an email out with no problem, but sometimes I got this.

Any help would be appreciated. Thanks!.

I have configured the email account correctly, following the office 365 suggestions and set the port to 587, security set at STARTTLS, yet it gets me this error. Sending of the message failed. An error occurred while sending mail: Outgoing server (SMTP) smtp.office365.com is unknown. The server may be incorrectly configured. Please verify that your Outgoing server (SMTP) settings are correct and try again. The funny thing was this happens from time to time, sometimes I could send an email out with no problem, but sometimes I got this. Any help would be appreciated. Thanks!.

All Replies (1)

Matt
Matt
  • Moderator
  • Top 10 Contributor
more options

I blame DNS. after all if the server is unknown it is because DNS has not located it.