Em Sexta 07 Julho 2006 07:45, Tim escreveu: > On Thu, 2006-07-06 at 15:55 +0200, Ambrogio wrote: > > I see some messages not ordered well. > > > > So some reply are not related to the right message id and so on. > > > > It's only my problem or someone else do see this behaviour? > > Typically caused by someone replying to a message from a digest, some > badly implemented web forum, or a crappy mail client. > > Messages have an "in-reply-to" header which identifies which particular > message it is in reply to. Some really crappy clients mightn't include > it when replying. > > They also have "references" header which lists all other other message > IDs of the messages in the same thread. Each time a client replies to a > message, it adds its own message ID to the list. Some crappy clients > don't do that. > > Both are used together to group messages in a thread, and order them > into the right sequence. They can't do that right without that > information. > > Some really crappy clients attempt to do that via the subject lines, > through sheer laziness in programming. And since they think it works > for them, some don't bother to use the proper headers (write them, add > to them, include them, etc.), and bugger it up for everyone else. > Microsoft's clients used to work that way, I haven't checked if they > still do. > > Digests (a whole lot of messages spooled together) can keep or lose > those headers. If they just bundle plain text message bodies together, > it's gone. If they do a MIME digest, where the entire message and > headers are kept for each message, proper replies *can* be done, but the > replying mail client has to make use of that information when doing its > reply. Some don't, or some people using them don't use them properly. And about non-related messages appearing in a thread, this often happens when a subscriber creates a new thread by replying to an existing one and changing the subject of the message. Some people do this to avoid typing the list address in the "to:" field when sending messages to the list. However, the above mentioned "in-reply-to" field in the message header will keep track of the original message and the "new" message will appear in the existing thread. []'s Marcelo
