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Old 29 Jan 2019, 06:22 AM   #1
jagomai
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Join Date: Mar 2008
Posts: 82
Question Rule condition to identify email replies

Hi,

I'm sorting emails from agencies based on a contact group called "agencies".

I only want the rule to trigger for new emails - not replies, even if included in the agencies group mentioned above.

Any way of identify replies that does not involve using glob expressions based on subject line? (I get emails in multiple languages...)

Thanks !
J
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Old 29 Jan 2019, 09:27 AM   #2
BritTim
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Location: mostly in Thailand
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I cannot see any totally reliable way of distinguishing an email as a reply. Even relying on the subject line might not work, as the subject line can be changed by the person replying. In effect, each reply is really a totally new message which we can usually see is a reply based on various visual cues.The best try I can think of is to use a slightly different Reply To address when sending to one of your agencies group contacts (something like myname+agencyreply@fastmail.com) and sort based on that.
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Old 29 Jan 2019, 03:23 PM   #3
jagomai
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Quote:
Originally Posted by BritTim View Post
I cannot see any totally reliable way of distinguishing an email as a reply. Even relying on the subject line might not work, as the subject line can be changed by the person replying. In effect, each reply is really a totally new message which we can usually see is a reply based on various visual cues.The best try I can think of is to use a slightly different Reply To address when sending to one of your agencies group contacts (something like myname+agencyreply@fastmail.com) and sort based on that.
Ok, thanks BritTim for the reply!
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Old 29 Jan 2019, 08:31 PM   #4
JeremyNicoll
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Wouldn't a rule for:

A header called In-Reply-To: does not exist

help?
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Old 30 Jan 2019, 12:25 AM   #5
BritTim
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Quote:
Originally Posted by JeremyNicoll View Post
Wouldn't a rule for:

A header called In-Reply-To: does not exist

help?
I had forgotten the In-Reply-To (and References) headers. Indeed, while technically optional, almost all mail clients these days will add an In-Reply-To header as recommended in the RFC (see https://tools.ietf.org/html/rfc5322 Section 3.6.4).
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Old 30 Jan 2019, 06:33 AM   #6
jagomai
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Quote:
Originally Posted by JeremyNicoll View Post
Wouldn't a rule for:

A header called In-Reply-To: does not exist

help?
Excellent, thank you! Have added that so let's see if it tends to work... :-)
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