AnsweredAssumed Answered

Mails sent from FileMaker via SMTP are considered SPAM

Question asked by HOnzaKoudelka on Jul 15, 2010
Latest reply on Jul 5, 2016 by Benjamin Fehr


Mails sent from FileMaker via SMTP are considered SPAM


FileMaker Pro



Operating system version

Mac OS X 10.6.3

Description of the issue

Mails sent from FileMaker Pro directly via SMTP are given high spam score because of invalid Message-ID and unnecessarily used Base64 encoding for the From header.

Steps to reproduce the problem

1. Send Mail via SMTP server to an e-mail account which hase server side spam filter, such as SpamAssassin setup to only add headers to spam but not delete it. Use complete from header including name and e-mail - i.e. "HOnza Koudelka"

2. Open the received e-mail and display raw headers

3. Look for headers From, Message-ID, X-Spam-Status and X-Spam-Report

Expected result

Well formatted e-mail should contain something like this:

From: "HOnza Koudelka"
X-Spam-Status: No, score=2.8 required=5.0 tests=AWL,RDNS_NONE
     autolearn=disabled version=3.2.1

The key is the status No and the score which should be well under the required 5.0.

Actual result

From: =?UTF-8?B?SE9uemEgS291ZGVsa2E=?=
X-Spam-Status: Yes, score=5.2 required=5.0 tests=FROM_EXCESS_BASE64,
     INVALID_MSGID,RDNS_NONE autolearn=disabled version=3.2.1
     *  3.0 INVALID_MSGID Message-Id is not valid, according to RFC 2822
     *  2.1 FROM_EXCESS_BASE64 From: base64 encoded unnecessarily
     *  0.1 RDNS_NONE Delivered to trusted network by a host with no rDNS


Use a plug-in to send e-mails directly through SMTP