Issue with Sending Email: [EFAULT] Failed to send email: 554, b'5.0.0

[shadowcyberdeck]

I'm somewhat new to TrueNAS, and I've been trying to setup emails to be sent to my protonmail email account via Hydroxide running on a Ras Pi 4 on my network, that is listening to SMTP traffic via it's IP Address and port 1025. Please see the attached image for the settings I've tried within TrueNAS, do note that "sample@protonmail.com" is not my real email address for authenticating to Hydroxide. The Error message I get is:

Code:

 "Error: [EFAULT] Failed to send email: (554, b'5.0.0 Error: transaction failed, blame it on the weather: unknown sender address')

Image of my current Email settings:

Show

In Hydroxide I don't see anything out of the ordinary, just that my email account is logged in and the SMTP server is listening. In TrueNAS, I've tried changing the "From Email" to another valid email address of mine, as well as the root users email address to various emails, but I keep getting the error above.

If your unaware Hydroxide is a CLI program for being able to use it as a means of receiving and forwarding SMTP/IMAP/CARDAV traffic from your network/server(s) over to your protonmail account by utilizing the protonmail APIs. https://github.com/emersion/hydroxide

 

[shadowcyberdeck]

According to this reddit post, it could be due to TrueNAS not adding in all the proper MIME information that is required by protonmail's bridge/Hydroxide: https://www.reddit.com/r/ProtonMail/comments/aysnb1/cannot_send_emails_from_protonmail_using/. Also the latest error I'm getting now that I have corrected a couple things like the IP address I was having Hydroxide start the SMTP server on:

Code:

554 5.0.0 Error: transaction failed, blame it on the weather: cannot create draft message: [2001] Invalid sender