[Mailman-Users] What is them max subject length?

[Lindsay Haisley]

Are you sure this isn't happening in a mail system component other than 
Mailman?  RFC 2822 specifies that "Each line of characters MUST be no more than
998 characters, and SHOULD be no more than 78 characters, excluding
the CRLF."  This includes headers.  My understanding of this is that an MTA is 
obligated to properly handle a header line of fewer than 78 characters, and is 
obligated to handle email with a header line length > 78 and < 998 characters, 
but may do so creativly, and may reject outright any email with a header line 
that exceeds 998 characters.  What you describe sounds like MTA behavior rather 
than Mailman behavior.  A few simple tests should answer this question.

Thus spake Nathaniel Nolet on Thu, Oct 19, 2006 at 10:42:40AM CDT
> Hello Mailman Users,
> 
> I recently rolled out a new mailserver and decided to use Mailman as  
> the mailing list software.  Everything has been going smoothly except  
> for one minor issue: it looks like sometimes a subject is too long  
> and gets turned into "(No Subject)", while the real subject becomes  
> the first line of the email.  I'd like to either change this setting  
> or let my end users know how long is too long, but I can't find the  
> max subject length documented anywhere, nor did it jump out at me on  
> the web interface.
> 
> I'm sure it's documented somewhere, but after checking the FAQ, the  
> Wiki, Google and The Fine Manuals I'm stumped.  Could someone point  
> me in the right direction?  Or does Mailman not do this at all and I  
> should look into that user's email client?

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