Hello Exchange gurus, I am having a very strange problem that only seems to have started Saturday night / Sunday morning. I think I have pinned it down to sending emails through gmail, through my phone, but I cannot understand where the issue comes from. From my phone if I send an email to an alias I have I receive an error message saying 550 5.1.1 <email@example.com>: Recipient address rejected: undeliverable address: host My Public IP[My Public IP] said: 530 5.7.57 SMTP; Client was not authenticated to send anonymous mail during MAIL FROM (in reply to MAIL FROM command)
I was having this for all my emails today but now it seems to only be for this particular one as far as I can tell. I googled 550 5.1.1 and it tells me the error means it cannot find the email address. To make matters worse, the alias was my primary address. I assumed something was broken on my end so I went as far as to completely destroy the user and recreate it. Once recreated I put the old primary as an alias. When I try to send an email to that address from my phone I receive that error. I have an Android phone, everything was working perfectly fine up until Saturday never had an issue.
My Default Frontend looks like this:The scope has a few remote IPs that I allow and my Exchange server as the Network Adapter Bindings
My Default looks like thisThe scope is default Can anyone shed some light on this? Thanks! : /answers/storage/attachments/13909-image.png
Any help would be appreciated!