Hi,
Last week my servers and all devices including sonicwall and email relay smart host went offline due some power losses in data centre. We could make it up only after 66 hours ( two and half days).
My problem is some of my users were expecting some important emails during that period and when server became online they did not recieve those emails.
I reviewed the email log from our Public ISP which shows that there were several email during that particular period to my domain
Is there any way to retrieve those emails ? how long an external server hold emails while my servers and smart host are offline?