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标准企业邮箱
Google Workspace
Office 365
Zoho
Yandex
腾讯企业邮箱 / 企业微信
飞书 [免费] [只能1个域名]
ProtonMail [加密]
Tutanota [加密]
migadu [不按人头收费]
mango [不按人头收费] [使用过-不稳定]
namecrane [不按人头收费] [目前有终身套餐]
邮件转发服务
Cloudflare Email Forwarding
SimpleLogin [开源] [存在终身Plan] [可回信] [搭配 Proton Mail 可发信]
Mailway [免费] [开源]
Forwardemail [免费] [收费版可用 SMTP]