SMTP AUTH LOGIN Auth Handler.

NewMessage creates new mail message object with default From header.

NewMessageFrom creates new mail message object with custom From header.

SendActivateAccountMail sends confirmation e-mail.

SendCollaboratorMail sends mail notification to new collaborator.

SendIssueMentionMail sends mail notification for who are mentioned in issue.

SendIssueNotifyMail sends mail notification of all watchers of repository.

SendRegisterNotifyMail triggers a notify e-mail by admin created a account.

SendResetPasswordMail sends reset password e-mail.