The Spam Experts inbound filter is quite efficient at preventing spam and allows you to manage which domains have permission to send emails to your domains. As for the client, I usually check emails from my mobile phone, and since I have Android, I use K9-Mail, which for me is the best option available. There’s also FairEmail if you’re interested in trying it. For desktop computers, I generally use Roundcube; I think it’s fine for basic needs. Occasionally, I also use the email integration from Nextcloud, though I can’t remember the client’s name. Thunderbird has improved significantly in recent years, and I think it’s a good alternative. I have also used Mailspring, which is open-source, although there was a part of it that I wasn’t completely satisfied with.
The Spam Experts inbound filter is quite efficient at preventing spam and allows you to manage which domains have permission to send emails to your domains. As for the client, I usually check emails from my mobile phone, and since I have Android, I use K9-Mail, which for me is the best option available. There’s also FairEmail if you’re interested in trying it. For desktop computers, I generally use Roundcube; I think it’s fine for basic needs. Occasionally, I also use the email integration from Nextcloud, though I can’t remember the client’s name. Thunderbird has improved significantly in recent years, and I think it’s a good alternative. I have also used Mailspring, which is open-source, although there was a part of it that I wasn’t completely satisfied with.