bug report: lmtp fails on root-squashed NFS filesystem

[Aki Tuomi]

> On 23/11/2021 23:47 Anne Bennett <anne at encs.concordia.ca> wrote:
> 
>  
> Following up to my own post:
> 
> > I'm trying to set up Postfix with dovecot LTMP delivery
> > on a host where the user files (/var/spool/mail as well as
> > home directories) are on NFS filesystems, which are exported
> > root-squashed to the mail server.
> 
> [LMTP delivery fails with "save failed to INBOX: Read-only mbox"]
> 
> > I found this posting where someone else had a similar problem
> > and traced it in some detail back in 2019:
> >
> >   https://dovecot.org/list/dovecot/2019-February/114611.html
> >
> > but apparently no one answered the fellow.
> 
> However, he was definitely on the right track, that is, file
> access was (incorrectly) checked as root, using "access()",
> instead of as the target user, using "euidaccess()".
> 
> I patched "src/lib-storage/index/mbox/mbox-storage.c" and
> "src/lib-storage/index/maildir/maildir-storage.c" to replace
> calls to "access()" with calls to "euidaccess()", and now mail
> delivery (to mboxes) works for me.  (I can't test maildir yet.)
> 
> Could this be considered for a patch to future versions, please?
> 
> 
> 
> Anne.
> -- 
> Ms. Anne Bennett, Senior Sysadmin, ENCS, Concordia University, Montreal H3G 1M8
> anne at encs.concordia.ca                                    +1 514 848-2424 x2285

Hi Anne!

Would it be possible for you to open a pull request on https://github.com/dovecot/core?

Aki