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I'm receiving lots of 'Undelivered Mail Returned to Sender' bounces | Knowledge Base ▸ MaxBulk Mailer Pro

I'm receiving lots of 'Undelivered Mail Returned to Sender' bounces

Knowledge Base ▸ MaxBulk Mailer Pro

Compatible with MS Windows Compatible with MacOS

I'm receiving lots of 'Undelivered Mail Returned to Sender' bounces


Question: For some reason most of my messages are bouncing. Maybe my email provider have did some changes because I have not change any settings. Find a bounce sample bellow. Any idea how to solve this? delivery temporarily suspended: conversation with[] timed out while receiving the initial server greeting
Reporting-MTA: dns; xxxx.xxxx.xxxx.xxxx
X-Postfix-Queue-ID: xxxxxxx
X-Postfix-Sender: rfc822; xxxxx@xxxx.xx
Arrival-Date: Wed, 8 Nov 2017 01:47:52 +0100 (CET)

Final-Recipient: rfc822;
Original-Recipient: rfc822;
Action: failed
Status: 4.4.2
Diagnostic-Code: X-Postfix; delivery temporarily suspended: conversation with[] timed out while receiving the initial server greeting

Answer: You get a 4.4.2 error.

The 4.4.2 error means the remote mail server (at closed the SMTP connection from your mail server early. If other mail servers are able to deliver to this domain successfully, then it's probably because the mail server for thinks your mail server is sending spam. To see if your mail server has a problem that would cause other mail servers to think it's a spammer, try sending a message from your mail server to This service will do lots of checks, and you'll get a report back with valuable information, such whether or not your mail server's DNS is setup correctly, whether your mail server's IP is on any black lists, etc.

If that doesn't give you the solution, then I suppose you can ask an admin from your server to check the spam filter logs to see why his spam filter is shutting off the connection from your mail server. His logs should show this.

Stan Busk Stan Busk
November 8, 2017

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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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