NGX_MAIL_SMTP_PROTOCOL  687 mail/ngx_mail_auth_http_module.c                 if (s->protocol == NGX_MAIL_SMTP_PROTOCOL) {
NGX_MAIL_SMTP_PROTOCOL  757 mail/ngx_mail_auth_http_module.c                 && s->protocol != NGX_MAIL_SMTP_PROTOCOL)
NGX_MAIL_SMTP_PROTOCOL   40 mail/ngx_mail_smtp_module.c     NGX_MAIL_SMTP_PROTOCOL,