@aegis yes it is MS Outlook for Iphone, was not working with wi-fi connection.. the circle around the VPN icon just kept rotating, had to disable Adguard VPN and then the message was sent.
Seems to be working now withthe latest update of outlook, will report back again if i have any issues though.@Venky unfortunately, no luck reproducing the issue. Maybe you could send us a DNS log? Please enable it in Adguard DNS settings, then reproduce the issue. If DNS log contains few records you can just take a screenshot or two of it, otherwise send us a message to support - DNS log will be automatically attached there. In this case post here your userID which is mentioned in the automatic email reply.