Re: [Nmh-workers] Starting the final call for features for 1.7

[William Hay]

Thus spake P Vixie:
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> The .mh_sequences file is read directly by some MUAs. That's likely wrong and 
> they should use shell commands to get at the data. But I don't think we 
> should violate their expectations at this late date.
> 
> Negative sequences is a better design. But if we put it in it has to be a 
> .mh_ profile option, defaulting to off.
> 
I don't think you necessarily need a separate option.  The current
behavior if you set the unseen sequence to begin with the sequence
negation prefix is to create a positive sequence beginning with the
sequence negation prefix which is something the mhequence man page
explicitly warns against doing.  Anyone doing this under the current
interpretation has been asking for trouble.

Obviously anyone using an MUA that directly interprets .mh_sequences
should not set the sequence negation prefix to match the unseen sequence
until all the MUAs they use support it.

William