Berllo

What Berllo is

Berllo (伯勒, published under the BerlloSoft copyright) makes Berllo Email Sender, called 伯勒邮件群发机 on its Chinese-language site: a Windows desktop program for sending bulk email from your own machine or server. It sends campaigns, newsletters, mailing list issues, customer notices, statements and payslips, and it is aimed at businesses that want to run their own sending rather than rent a hosted service. The About page says the company has worked on bulk email and email marketing software since 2008, and the home page claims more than 100,000 customers use its software. The site is written entirely in Chinese.

Because the software runs on your own computer or server and sends through mailboxes and servers you control, it sits in the self-hosted part of this directory. There is no hosted dashboard, no shared sending infrastructure and no per-contact subscription. You buy a license, install the program, and supply the sending capacity yourself.

What it sends and for whom

The product page lists the fields the software is meant for: foreign trade promotion, e-newsletter distribution, mailing list subscription sends, business customer contact, member marketing for e-commerce platforms, financial statements, payroll slips and general notifications. It says the program is suited to mainstream domestic mailboxes such as QQ and NetEase as well as to foreign trade email, and that it can send to any mailbox. The About page adds a firm line: sending any unsolicited spam is strictly prohibited.

The testimonials on the home page come from logistics, freight, trade and exhibition companies. One reviewer says the software sends 10,000 emails a day for them; another says the company bought many licenses and sends a million emails a day. These are customer statements, not published limits.

Two ways to send

Berllo Email Sender offers two sending modes. In sender-box mode it logs into SMTP mailboxes you own and sends through them. The software supports every kind of SMTP mailbox, including Hotmail, Outlook, company mail and self-built mail servers, over SSL/TLS, and it added OAuth2 and Microsoft Graph login in its 2024 and 2025 releases, with bulk import of token-format mailboxes. A built-in verifier checks the passwords of a whole batch of sender accounts in one click and fills in the SMTP server, port and security setting on its own.

The second mode, which the site calls express delivery (特快专递), needs no sender account at all: the program looks up the recipient domain's MX record and delivers directly. A 2024 tutorial on the site explains the difference between SMTP sending and MX delivery. The home page says that combining express delivery with a multi-IP server or IPv6 is how you reach large volumes.

Throughput is set by you. The software sends on up to 200 threads, supports SMTP pipelining (added in version 6.4.0), and lets you set a minimum interval and a daily maximum for each sender mailbox so that no single account is pushed too hard. It can rotate across many sender mailboxes, and it supports IP changes through dial-up VPS servers, multiple IPs on a network card, SOCKS4, SOCKS5 and HTTP proxies (with an option to pull proxy lists from an API) and IPv6.

Writing and personalizing messages

Messages can be plain text, HTML or raw MIME. The HTML editor has code highlighting and supports images and attachments, and you can import HTML and EML files. The home page says the software handles dozens of variables: more than 50 system variables plus unlimited custom variables, which can nest inside one another. Recipient lists import from TXT and Excel with up to 10 fields per address, such as a name, so each email can address its recipient one to one. Spintax arrived in version 6.2.1, and a JavaScript variable feature lets you write code that generates a value at send time.

You can load several subject lines and several bodies and have the program rotate them in order or at random, so that no single piece of content goes to every address. Encoding covers many languages; the home page names Simplified and Traditional Chinese, Korean and English, and the 6.2.0 release added Japanese character sets. The program can also convert Simplified Chinese to Traditional Chinese or pinyin.

A large share of the feature list is about getting mail past filters: text rendered as images, hidden variables, one-click replacement of sensitive words, custom and suppressed mail headers, random attachments and simulated mail clients (Foxmail, Outlook and QQMail 2.x, or a custom client). Readers who send only to subscribers who opted in will use little of this; the legal notice on the About page says the software may only be used for legitimate email promotion and within all applicable laws.

Authentication, list hygiene and tracking

The software signs mail with DKIM and generates the public and private key in one click. It can create several DKIM keys with different private keys at once, import an existing PEM key, sign one message with up to three DKIM signatures, and produce the DNS text for the record. A built-in DNS lookup queries A, MX, SPF and AAAA records in bulk, along with a domain's registration details.

On the recipient side, it can verify in bulk whether addresses exist and delete the ones that do not, filter a blacklist of addresses, domains or user names while sending, and pull email addresses out of any text file you drag into it. The program has its own statistics and unsubscribe system, which the product page says shows how many times an email was viewed and other details. Sending can be scheduled with a start and end time, the computer can shut down when the job is done, and the send state is saved as it goes, so after a crash or a power cut the program resumes where it stopped.

PMTA setup and the DNS checker

Since version 5.4.1 the program includes a fully automatic PMTA mail server setup tool that builds servers on several threads and sets up domain resolution. Version 5.9.4 added export of the DNS records, so domains registered outside Aliyun (阿里云) can be used too. This is the part of the product for buyers who want their own MTA rather than a pile of mailboxes.

Berllo also sells a separate DNS Record Batch Checker. It checks MX, A, SPF and AAAA (IPv6) records for domains or email addresses, imports millions of records at once, spreads lookups across several DNS servers so one server does not choke under many threads, retries failures for accuracy the product page puts at up to 99.9%, and saves results as it goes. It runs on Windows 7, 8, 10 and 11 in 32-bit and 64-bit form and is 8.7M in size.

Open API

The open API turns the desktop program into a sending service your own system can drive. You enable it in the options; it listens on port 8060 by default (the port can be changed), accepts GET and POST with JSON bodies in GBK encoding, and can be exposed on a server with a public IP. For public use the site recommends turning on signing, where each request carries a berllosoft-auth header holding an MD5 signature. There are four endpoints: a connectivity test, a batch send that uses a template already set up in the program (with up to five macro fields per recipient), a single push that sets its own subject and body, and a query that returns the result of each send by its GUID. The site's example use is triggered email: watching a QQ group and mailing each new member.

Platform requirements

Berllo Email Sender runs on Windows 7, 8, 10 and 11 and on Windows Server 2012 and later, in 32-bit and 64-bit editions. The current version on the product page is 6.4.1, dated September 2026, at 26M. The changelog shows frequent releases, and version 5.0.0 added one-click online updates. There is no macOS, Linux or web version on the site.

Pricing and trial

The product page lists the Email Sender at 180 per month, 360 per quarter or 980 per year; the DNS checker is 30 per month or 200 per year. Neither page prints a currency sign. Both offer a free test: download the software, register an account and use it for one day. The Email Sender test version imports at most 50 mailboxes at a time, and the DNS checker test version at most 50 records.

Support

Support runs by email at service@berllo.com, and the About page invites feature requests the same way. The site carries a FAQ, a bounce analysis guide and a series of tutorials on importing Excel lists, Gmail and Microsoft mailboxes, Spintax, multiple DKIM records and deploying the open API.

Who it suits

Berllo fits a technically confident team that sends high volumes, reads Chinese, runs Windows, and wants to own the whole sending stack from the mailboxes or MTA to the DNS records. The license is cheap next to a hosted platform priced by contacts. The caveats are the Windows-only desktop model, a Chinese-only site and interface, and the responsibility that comes with sending from your own servers: reputation, compliance with anti-spam law and consent are entirely yours to manage.