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Old 31 Dec 2023, 02:30 AM   #2
BritTim
The "e" in e-mail
 
Join Date: May 2003
Location: mostly in Thailand
Posts: 3,095
I assume you are looking to access your email using a desktop (or mobile) mail client rather than the web interface. If that is not your intention, please make this clear, and I will cover the approach when using the Fastmail App or using Fastmail through the browser.

This is a fairly big subject to get everything set up perfectly. I summarise my preferred approach briefly below.

The exact approach which is best to use depends on the capabilities of your mail client. However, in most cases, the following works well..

First, recognise that, by default, all your domains, and the default Fastmail domain, use the same set of folders. What you can do is create a separate folder hierarchy under Inbox for each of your custom domains. That is, create something like:

Code:
Inbox --+
             |
             +- MyDomain1--+
                                        |
                                        +- In
                                        +- Sent
                                        +- Sales
                                        +- etc.
             |
             +- MyDomain2--+
                                        |
                                        +- In
                                        +- Sent
                                        +- Enquiries
                                        +- etc.
You then defines Rules that ensure incoming and outgoing messages for each domain go the the correct In and Sent folders. Note that there is a setting under Folders that allows you to specify the default From email address when sending emails using the browser interface or Fastmail app when within that folder or its subfolders.

When setting up your mail client, You usually have two options (though some clients are more limited). You can use a single IMAP connection, but then use Identities to ensure you view the appropriate folder hierarchy for each domain. Alternatively, you can override the IMAP Path to specify, for instance, that you only want to see folders under Inbox/My Domain2 for this IMAP connection. If you want to do this, but still have multiple Domains visible within the same client using multiple IMAP connections, there are several alternative forms that can be used for the Fastmail login name (for instance, john/fastmail.com instead of john@fastmail.com) using different IMAP Path specifications.

See if this helps, or you need better advice. Maybe, others will suggest approaches you like better.
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