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SMTP Host not connecting to Exchange Online Servers
Published: Wednesday, 25 April 2018 | Categories: Office365 | Keywords: SMTP | Status: Posted | Created: Wednesday, 25 April 2018 | Author: paul

SMTP Host not connecting to Exchange Online servers.

When testing the connection the responses to the SMTP commands is blanked out with stars.

This was due to a Cisco firewall mailguard feature. Instructions to disabling the mailguard feature are in the webpage below.

https://support.microsoft.com/en-gb/help/320027/cannot-send-or-receive-e-mail-messages-behind-a-cisco-pix-or-cisco-asa.


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