I've self hosted my email forwarding service on my own domain for over a decade, but eventually gave up because of deliverability issues that were out of my control - primarily with Microsoft's email services.
I've switched 3 years ago to a hosted forwarding service forwardemail.net
Pros:
* Allows to switch email providers if needed
* Allows to forward email to multiple providers
* Allows to store backups of emails
* Allows to have emails on multiple domains for different contexts (personal/professional/projects/etc.)
* Allows to have different email addresses per service. If you get spam on that email address you can just stop forwarding emails for it.
* Allows to have reliable mail rules based on the email address
* Allows also to send emails from multiple addressses
* Most spam is filtered before it reaches the inbox
* Open source
* Would be easy to switch to a different email forwarding service if needed (or self host it).
* Excellent track record over 8+ years
Cons:
* They have the potential to snoop on your emails. Any service that's really important would have 2FA enabled, so I accept the risk.
* They have the potential to send emails on your behalf - again, they've earned my trust, so I accept the risk for that.
* Add another point possible failure. So far I haven't noticed any issues with it.
* There's greylisting that delays emails for 5 minutes if they are not on the whitelist, which affects some of less common sending services.
* In very rare cases, some services ban registering with a forwarding email addresses.
* You need to make sure you don't lose your domain. I renew it 5 years before expiry with a reputable domain registrar (NameCheap).
* Video [2]
1. https://x.com/lauriewired/status/2041566601426956391 (https://xcancel.com/lauriewired/status/2041566601426956391)
2. https://www.youtube.com/watch?v=KKbgulTp3FE