Missing 'in-reply-to' in 6.1.8

[dimyy]

https://github.com/espocrm/espocrm/blob/576f424bc06cb87a50804ff7eea58cde79291add/application/Espo/Services/Email.php#L286

is missing in stable 6.1.8

It's a big trouble

[yuri]

This should not be logged as a bug.

If it's very important for you you can add it to the code before the release. For 8 years we didn't have this feature.

[dimyy]

Two EspoCRM cannot communicate correctly with each other. Each reply open new case in other side

[yuri]

IIRC we use References header rather than In-Reply-To to detect what the email is related to. I'm not sure setting the in-reply-to header will help.

[dimyy]

Only one point where repliedId used in mail\importer.php

References used to link contact or account, not case.

If there was no in-Reply-To header, then the reply email is not linked to the original one and a new case is created.

[dimyy]

About 'refernces': I see references in importer.php but don't see where references set is.

[yuri]

It's set via Message-Id I believe.

[yuri]

References used to link contact or account, not case.

It's not true.

If there was no in-Reply-To header, then the reply email is not linked to the original one and a new case is created.

It's unlikely.

[dimyy]

If I mistake proof please.

Full text code search don't found any reference to message 'references' atrubute usage othewise provided screen

[yuri]

Screenshot with code you posted. Read it to understand that it works for any entity.

[dimyy]

I see 3 message header fields:
1. Message-Id - referenced to original linked entity
2. in-reply-to: used when imported to detect previsous email and detect create case or not, don't sended
3. references: used to detect referenced lead/contact/account, don't sended

[yuri]

> 2. in-reply-to: used when imported to detect **** and detect create case or not

Can you point where In-Reply-To is used to detect whether to create case or not?

I believe that to fix your problem we need to send "Rererences' header rather than In-Reply-To. Message-ID of the replied email should be set in References header of the email being sent.

[dimyy]

1. Define $replied by in-reply-to

https://github.com/espocrm/espocrm/blob/3e6bc02256914a583292f7a3e7b94d0e6db61817/application/Espo/Core/Mail/Importer.php#L251

2. Set received email parentType ParentId from $replied

https://github.com/espocrm/espocrm/blob/3e6bc02256914a583292f7a3e7b94d0e6db61817/application/Espo/Core/Mail/Importer.php#L327

3. Check parentType == 'Case' and skip emailToCase below

https://github.com/espocrm/espocrm/blob/3e6bc02256914a583292f7a3e7b94d0e6db61817/application/Espo/Services/InboundEmail.php#L560

[yuri]

I see now. We didn't have this logic initially, it was added in some 4.x version. I forgot about its existence. In most cases a mail client sends References header and the parent is resolved by References. Anyway I will add the References header for replied emails in v7.0.0.

[esforim]

Thanks you both of you!