Re: header question

Hi Albrecht,

On 2020.05.23 12:59, Albrecht Dreß wrote:
> Hi Jack!
> 
> Am 23.05.20 18:44 schrieb(en) Jack via balsa-list:
>> Not specifically Balsa related, but an email correspondent just  
>> asked my why my email didn't have a Reply-To: header.  I always  
>> thought it was present, but I see not.  Should it be, or should I  
>> just tell him it is HIS software that is wrong, since it should  
>> reply to the From: address if there isn't a Reply-To: ?
> 
> Quoting from RFC 5322, Section 3.6.2  
> (<https://tools.ietf.org/html/rfc5322#section-3.6.2>):
> 
>>> 3.6.2.  Originator Fields
>>> 
>>> The originator fields of a message consist of the from field, the  
>>> sender field (when applicable), and optionally the reply-to field.  
>>> […] In either case, an optional reply-to field MAY also be  
>>> included, which contains the field name "Reply-To" and a  
>>> comma-separated list of one or more addresses.
>>> […]
>>> The originator fields indicate the mailbox(es) of the source of the  
>>> message.  The "From:" field specifies the author(s) of the message,  
>>> that is, the mailbox(es) of the person(s) or system(s) responsible  
>>> for the writing of the message.
>>> […]
>>> The originator fields also provide the information required when  
>>> replying to a message.  When the "Reply-To:" field is present, it  
>>> indicates the address(es) to which the author of the message  
>>> suggests that replies be sent.  In the absence of the "Reply-To:"  
>>> field, replies SHOULD by default be sent to the mailbox(es)  
>>> specified in the "From:" field unless otherwise specified by the  
>>> person composing the reply.
> 
> IOW, if the message you sent contains a From: field (it will, as it  
> is required), it /is/ well-formed, and a Reply-To: would be required  
> /only/ if you want the reply to be transmitted to a different mailbox.
> 
>> (his complaint is that he always needs to type my address in the To:  
>> field.)
> 
> Sounds as if that mailer is broken, or the From: field not being  
> recognised properly for some strange reason.
My friend says “  Maybe a peculiarity if Mac’s Mail.app.  They are  
starting to fuck it up. "  He sent a screenshot - and it has the From:  
correct, but shows an empty Reply-To which seems odd if it isn't  
present at all in the message.
> 
> Best,
> Albrecht.
> 
> P.S.: I didn't have time yet to look deeper into the MBox crash, as  
> I'm fighting with a broken system update; it's not forgotten…

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