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How to send bulk email with Office365 | MaxBulk Mailer ▸ Frequently Asked Questions

How to send bulk email with Office365

MaxBulk Mailer ▸ Frequently Asked Questions

Compatible with MS Windows Compatible with MacOS

How to send bulk email with Office365


These are the Office365 MaxBulk Mailer settings:

SMTP server access
SMTP Host smtp.office365.com:587
Connections 5
Security TLS v1 Exp
Authentication ESMTP | Login
Account ID <your_maxbulkmailer_mailbox_id> (Create an App password for MaxBulk Mailer)
Password <your_maxbulkmailer_password> (the password of the mailbox you have created for MaxBulk Mailer)
Delivery Singly
Group mails 25
Interval 00:03:45
Sender information
From <your_sender_address>
Name <your_display_name_here>

Note that Office365 has several delivery limits: 10'000 messages with up to 500 recipients per message in bulk mode. More information here.

Always double check email addresses of recipients (with eMail Verifier) before hitting the Send button. That’s because your account will get disabled if the email message contains a large number of non-existent or broken addresses (<25 ?) that bounce back on failed delivery.

It is recommended to create an App password for MaxBulk Mailer. Use that App password as your Office365 credentials in MaxBulk Mailer.



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MaxBulk Mailer is a full-featured and easy-to-use bulk mailer and mail-merge software for macOS and Windows that allows you to send out customized press releases, prices lists, newsletters and any kind of text or HTML documents to your customers or contacts.

MaxBulk Mailer is fast, fully customizable and very easy to use. MaxBulk Mailer handles plain text, HTML and rich text documents and gives full support for attachments. With MaxBulk Mailer you will create, manage and send your own powerful, personalized marketing message to your customers and potential customers.

Thanks to its advanced mail-merge and conditional functions you can send highly customized messages and get the best results of your campaigns. You also have support for international characters, a straightforward account manager with support for all type of authentication schemes including SSL, a complete and versatile list manager, support for importation from a wide range of sources including from remote mySQL and postgreSQL databases.

MaxBulk Mailer is a software tool that you purchase once, no need to pay on a per-email basis to submission services!

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