Question

When sending mail to multiple recipients, the X-Recipient header repeats, one for each recipient. For instance, when looking at View Source in FogBugz, I see this:

X-Sender: "Foo" <foo@sample.com>
X-Receiver: "Bar" <bar@sample.com>, "Baz" <baz@sample.com>, "Qux" <qux@sample.com>
X-Receiver: "Bar" <bar@sample.com>, "Baz" <baz@sample.com>, "Qux" <qux@sample.com>
X-Receiver: "Bar" <bar@sample.com>, "Baz" <baz@sample.com>, "Qux" <qux@sample.com>
Date: Tue, 17 Aug 2010 17:32:34 -07:00
From: "Foo" <foo@sample.com>
To: "Bar" <bar@sample.com>, "Baz" <baz@sample.com>, "Qux" <qux@sample.com>

Looking at the raw source at the receiving end, I see this (note the missing comma between Qux and Bar--there are two spaces instead):

X-Receiver: "Bar" <bar@sample.com>, "Baz" <baz@sample.com>, "Qux" <qux@sample.com>  "Bar" <bar@sample.com>, "Baz" <baz@sample.com>, "Qux" <qux@sample.com>  "Bar" <bar@sample.com>, "Baz" <baz@sample.com>, "Qux" <qux@sample.com>

The repeating lines are grouped by recipient field: To and CC repeat their multiple lines separately (e.g. if I have 2 recipients in the To field, and 3 in the CC field, I get 2 lines each with the 2 To addressees, and 3 lines each with the 3 CC addressees, rather than 5 lines with 5 addressees each). This translates into a bunch of extra X-Recipients, which seems to be causing problems with our associated mail server, and doesn't seem like desired behavior in any case.

The specific incident that triggered my investigation was an email that failed to be sent to clients. There were 9 recipients CC'ed on the message, which resulted in 82 X-Receivers instead of 10.

It is occurring on FogBugz Version 7.3.3 (DB 745, Build 2047) on Windows.

Case FC1930793

Answer 1

Where are you copying your example email from?

If you're obtaining the email source by clicking on the small drop down arrow in the upper right-hand corner of an email event and selecting "View Source" you will not necessarily be seeing the headers that are actually being sent.

When an email is sent in FogBugz we first serialize it to the MailQueue table. Then, the FogBugz Maintenance Service will periodically trigger the actual mail sending process. At this stage, the email is read in from the MailQueue table and sent. During this step any X-Receiver headers in the email are ignored.

Can you check the raw email source on the receiving end to see if the same problem exists? In my tests, I've found that only a single X-Receiver header is being sent.

UPDATE: This has been fixed and will be released with FogBugz 8. The email source shown when selecting "View Source" will now more closely match what is actually sent (a single X-Receiver header with no duplicates).