What or who is the best email client/host to use?

Google Workspace (formerly G Suite)

• Your domain name: Yes.
• Mailbox size: 30GB, 2TB, and 5TB.
• Spam and virus protection: Yes.
• Aliases: Yes.
• 24/7 support: Chat, ticket, or phone.
• Archiving and storage: Depending on the plan.

Microsoft 365 Business Premium

• Your domain name: Yes.
• Mailbox size: 50GB and up.
• Spam and virus protection: Yes.
• Aliases: Yes.
• 24/7 support: Chat, ticket, or phone.
• Archiving and storage: Depending on the plan.

Amazon WorkMail

• Your domain name: Yes.
• Mailbox size: 50GB.
• Spam and virus protection: Yes.
• Aliases: Yes.
• 24/7 support: Chat, ticket, or phone.
• Archiving and storage: Added fee.

Rackspace

• Your domain name: Yes
• Mailbox size: Unlimited
• Spam and virus protection: Yes
• Aliases: Yes
• 24/7 support: Chat, ticket, or phone
• Archiving and storage: Added fee

Greatmail

• Your domain name: Yes.
• Mailbox size: 10GB or 25GB.
• Spam and virus protection: Yes.
• Aliases: Yes.
• 24/7 support: Chat, ticket, or phone.
• Archiving and storage: Added fee.

IceWarp Cloud

Your domain name: Yes.

Mailbox size: 5GB, 100GB, and 500GB.

Spam and virus protection: Yes.

Aliases: Yes.24/7 support: Chat, ticket, or phone.

Archiving and storage: Included.

Intermedia

• Your domain name: Yes.
• Mailbox size: Unlimited.
• Spam and virus protection: Yes.
• Aliases: Yes.
• 24/7 support: Chat, ticket, or phone.
• Archiving and storage: Depending on the plan.

Web hosting providers offering email hosting

GoDaddy

• Your domain name: Yes. And I’d sure like to register it for you!
• Mailbox size: 5GB and 50GB.
• Spam and virus protection: Added fee.
• Aliases: Yes.
• 24/7 support: Chat, ticket, or phone.
• Archiving and storage: Added fee.

Hostinger

• Your domain name: Yes.
• Mailbox size: 10GB or 30GB.
• Spam and virus protection: Virus.
• Aliases: Yes.
• 24/7 support: Chat, ticket, or phone (surcharge for priority support).
• Archiving and storage: No.

A2 Hosting

• Your domain name: Yes.
• Mailbox size: Unlimited*.
• Spam and virus protection: Yes.
• Aliases: Yes.
• 24/7 support: Ticket-based.
• Archiving and storage: free on some plans.

DreamHost Professional Email

• Your domain name: Yes.
• Mailbox size: 25GB*.
• Spam and virus protection: Yes.
• Aliases: Yes.
• 24/7 support: Chat widget.
• Archiving and storage: No.

BlueHost

• Your domain name: Yes.
• Mailbox size: 15GB or 50GB.
• Spam and virus protection: Yes.
• Aliases: Yes.
• 24/7 support: Chat, ticket, or phone (at reduced hours due to COVID-19).
• Archiving and storage: Added fee.

Namecheap

• Your domain name: Yes.
• Mailbox size: 5GB, 30GB, and 75GB.
• Spam and virus protection: Yes.
• Aliases: Yes.
• 24/7 support: Chat and ticket-based.
• Archiving and storage: No.

List quoted from: Best email hosting 2021: Top providers compared | ZDNet as of April 1, 2021