Re: [exim] exim maildirsize quota calculation in the face of symlinks
Hi all, On 10-02-2022 12:10:53, Jeremy Harris via Exim-users wrote: On 10/02/2022 10:55, Maarten van Baarsel via Exim-users wrote: I was surprised by the symlink behaviour so I'm reconsidering the use of the dovecot plugin, but I still wanted to ask whether this behaviour is considered OK. I've read the appendfile docs and I could find anything explicit about symlinks. The coding probably doesn't consider the possibility of multiple paths into a single directory, as afforded by the use of symlinks, at all. I've not checked, though. "OK" is in the eye of the beholder, naturally. Handling the case would likely be a feature-addition. The fastest fix would be to not traverse symlinks, I suppose. I'd like to say thanks for the replies, and ask for guidance how to put this on the feature-addition-list so that it won't be forgotten, I did find the problem Cyborg was alluding to in a post from a while ago :) I had a quick look at the code but did not see a fast path to a fix. Maarten. -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
[exim] exim maildirsize quota calculation in the face of symlinks
Hi,
I'm using Exim 4.90.1 on an Ubuntu 18.04 machine with dovecot 2.2.33 as
IMAP server.
Currently, I'm also using a plugin in dovecot:
https://wiki.dovecot.org/Plugins/MailboxAlias
to make sure the users with different names for the Sent and Trash
folder ("Verzonden items", "Deleted Messages") see the same name between
different user agents.
However, this plugin solves the alias problem with a symlink in the
Maildir directory, which makes Exim count the mails twice when the
appendfile transport is calculating quota sizes.
I managed to grab part of an exim -d+all delivery when a user was over
quota:
10:50:48 18038 maildir_compute_size:
path=/var/mail/virtual/cobergh.nl/cynthias.2097/Maildir/.Sent
10:50:48 18038 sum=2466048922 filecount=8701 timestamp=1644486536
[...]
10:50:48 18038 maildir_compute_size:
path=/var/mail/virtual/cobergh.nl/cynthias.2097/Maildir/.Sent Messages
10:50:48 18038 sum=2466048922 filecount=13088 timestamp=1644486536
and sure enough, one of these directories is a symlink to the other:
root@mx-1:/var/spool/mail/virtual/cobergh.nl/cynthias.2097/Maildir# ls -asF |
fgrep .Sent
4 .Sent/
0 .Sent Messages@
root@mx-1:/var/spool/mail/virtual/cobergh.nl/cynthias.2097/Maildir# stat .Sent\
Messages
File: .Sent Messages -> .Sent
Size: 5 Blocks: 0 IO Block: 4096 symbolic link
[...]
I was surprised by the symlink behaviour so I'm reconsidering the use of
the dovecot plugin, but I still wanted to ask whether this behaviour is
considered OK. I've read the appendfile docs and I could find anything
explicit about symlinks.
the transport part of the config:
virtual_delivery:
driver = appendfile
# let op: geen spatie voor de \ want dat wordt ".../Maildir "
directory =
/var/mail/virtual/$domain/${sg{$local_part}{/}{-}}.${extract{user_id}{$address_data}}/Maildir\
${if bool{$acl_m_mailIsSpam}\
{${if
match_domain{$acl_m_connectionDomainname}{+martin_domains}\
{}\
{/.Junk}\
}\
}\
{${if ! or{ {eq{$address_file}{}}
{eq{$address_file}{inbox}}}\
{/.${sg{$address_file}{/}{-}}}\
{}\
}\
}\
}
directory_mode = 2750
mode= 0640
user= ${extract{uid}{$address_data}}
group = mail
maildir_tag = ",S=$message_size,W=$message_size"
headers_remove =
Lines:Content-Length:Status:X-IMAP:X-IMAPbase:X-Keywords:X-Status:X-UID:X-UIDL
headers_add = "Lines: $body_linecount"
use_crlf
maildir_format
create_directory
delivery_date_add
envelope_to_add
return_path_add
#quota opties
quota = ${extract{quotum}{$address_data}}
quota_size_regex = S=(\d+)
quota_is_inclusive= false
maildir_quota_directory_regex = ^(?:cur|new|\.(?!Trash).*)$
quota_warn_threshold = 95%
quota_warn_message= MSG_QUOTA
maildir_use_size_file
thanks,
Maarten.
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Re: [exim] manualroute defer
On 27-03-2019 10:40:17, Andrew C Aitchison wrote: Hi Andrew, Thank you for the reply! Can someone shed some light on this? Should I be using multiple routers with an option I failed to find when reading the docs? That might get exim to try more than one host each queue run. However, if a smarthost is not responding, something is wrong. You should be aiming for this not to happen. If a smarthost does fail to respond, your aim is for something sensible to happen eventually, not to try to maximise performance. Thus I would be happy if the message is delivered by the next queue run. I implemented hosts_override halfway but I dove into the docs again, and then stumbled over fallback_hosts in the routers chapter and I think I got it now: dnslookup: driver = manualroute transport= internal_smtp route_list = * 192.168.84.30 no_more the transport: internal_smtp: driver = smtp interface = OUTGOING_INTERFACE fallback_hosts = 192.168.84.31:192.168.84.32 seems to work as I test it. There's no other routers for that transport, so I hope it's OK. thank you again! Maarten. -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
