monitor external services such as webmail dmz portals etc

how can i monitor my external services such as

dmz portals

how can i monitor that my exchange server is capable of accepting mails
sometime we dont know these services are down til they are reported bt an end user

how can i monitor that these external services are up and ready
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Simon Butler (Sembee)ConsultantCommented:
For email, I use MX Alerts.
The only difference to their instructions is that I use a mail enabled contact rather than a mailbox, so I don't have to enable Forwarding.

For web services, loads of services that can monitor those for you.

dougdogAuthor Commented:
any others?
any that will let me monitor multiple services and websites
Aaron TomoskySD-WAN SimplifiedCommented:
I use the free
If you want more frequent checking you can pay

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dougdogAuthor Commented:
dont think it can monitor an email complete send / receive
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