Amazon SES (http://aws.amazon.com/ses/) PostMark (http://www.postmarkapp.com/) CritSend (http://www.critsend.com/) SendGrid (http://sendgrid.com/) SocketLabs (http://www.socketlabs.com/) MailChimp (http://www.mailchimp.com/) 免费试用额度： Amazon SES：每月赠送 [...]

Yahoo邮箱原来有过免费的POP和IMAP，只是后来Yahoo关闭了而已，端口改为993。其实 IMAP apple.imap.mail.yahoo.com imap-ssl.mail.yahoo.com imap.apple.mail.yahoo.com SMTP设置 smtp.mail.yahoo.com smtp.att.yahoo.com smtp.mobile.mail.yahoo.com 注意端口和勾选“我的服务器要求身份验证”。

Incoming settings Email address: yourname@yahoo.com Username: yourname@yahoo.com Password: ****** IMAP server: android.imap.mail.yahoo.com Security type: SSL Server [...]