Additional IMAP accounts fail to send with SMTP originator not accepted error

[adrw]

Hi! I have a few email addresses on different domains that Cloudron handles email for. I have tried to add domain2 and domain3 to my domain1 SOGO account so I can see all my emails in one place like I can with Rainloop.

Unfortunately, while the initial IMAP setup works and I can read email, anytime I send from domain2 or domain3 it fails with the following error.

cannot send message: (smtp) originator not accepted 

My IMAP configuration matches what is shown for domain1 which was filled in by Cloudron when I login, namely the following.

Server name: my.domain
Port: 993
Encryption: SSL
User name: account@domain2
Password: {password for account}

Any ideas what I might be doing wrong or what to try and investigate next?

[girish]

@adrw I think this setup doesn't work with SOGo because SOGo does not have a mechanism to have a different SMTP info for each mailbox/account. I am not sure why it's this way but this is how the app is (unlike other email apps). From what I can tell, it's designed to be used with a single account or multiple accounts on the same domain but not different accounts from different domains.

@nebulon can confirm if this is the case.

[nebulon]

That is correct, SOGo works only with one STMP per account. Also not sure why that restriction ist there and design choice was made.