Would any of you know if the following scenario is "doable"?
We run an old Exchange 2010 infrastructure at my work, and there is no way
they are going to spring for newer: getting them to go from 2003 to 2010
was an ordeal...
Could I set up an Ubuntu Postfix "relay" server between Exchange and the
Internet, that also permits one particular mailbox to be accessible from a
Dovecot install on the same server (as well as relaying the mail for that
mailbox to Exchange)?
Yes/no and pointers most welcomed.
I've been self-hosting an ancient mailman 2.x service for many years for
the residents' association where I live, and it's time to move on. Apart
from anything else, I dread to think what security holes may still exist.
But we're experiencing issues with SPF failures causing bounces and
eventual unsubscribes, which I'm not even sure mailman 3.x handles any
better than 2.x.
So I'm looking for recommendations on a way forward, and figured this list
is full of knowledgeable sorts who probably have experience with various
options. I should mention that these lists are used for discussion, not
just for broadcasting one-way announcements.
mailman 3.x seems to be substantially more complex than 2.x, but I don't
see that as an issue, because I've decided to move away from self-hosting
since I just don't have time to become a mailman expert. Moving to SaaS
would also increase the service's bus factor above 1, and provide some
added security through isolation from other services currently on the same
I'm loathe to move to Google Groups since some of our residents are very
anti-Google, and I expect their support will be awful if ever needed. It's
also a closed source dead end. I'd prefer to pick a SaaS offering based on
Free/Open Source, to support continued development of that. I'm inclined
to go with a mailman 3 SaaS offering, and the following two both look very
promising because they're decently priced, can migrate my existing 2.x
lists, and can host on London servers:
There's also https://mailman3.com/ which can host in the EU, but I'm not
sure if they offer migration.
Does anyone have any experience with any of these, or have recommendations
of good alternatives to mailman (preferably with options to migrate
existing mailman lists)?
Thanks a lot!
For many years I've run a poor-man's mailing list through /etc/aliases
on my VPS. Before you start breaking out the flaming torches and
pitchforks, it's very limited in scope; it forwards only within my
immediate household, albeit to mailboxes hosted by gmail and hotmail.
I've just learned that some mails to this alias are being quarantined or
bounced at their ultimate destinations. They're passing SPF (because
envelope-from is postmaster@ my vps) but failing DMARC (the external
From address isn't being rewritten). When the sender has full DMARC
enabled, we lose.
My VPS is running Debian with exim4.
I think I might like to rewrite "From: foo(a)bar.baz" to something like
"From: postmaster+foo_bar.baz(a)my.domain" in order to satisfy DMARC, but
only when forwarding via this particular alias. I'm not readily figuring
out how to do this, and am leery to tangle with Exim's rewrite rules anyway.
Would anybody care to venture whether this is possible? a good/bad idea?
alternative solutions? I am looking for a least hassle, least
maintenance answer, ideally at little or no additional cost (hence
/etc/aliases has served well for a long time). On a unicorn, naturally :-)
(No I don't run mailman - I used to but I found it rather tiresome to
set up, feed and water.)
I have an old Ubuntu 16.04 install that is beginning to give me a tonne of
grief with apt.
It has now happily upgraded (well) past kernel 4.4.0-210, but it's refusing
to go further because it can't remove -210 any more:
# apt remove --purge linux-modules-extra-4.4.0-210-generic
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED
0 to upgrade, 0 to newly install, 3 to remove and 18 not to upgrade.
3 not fully installed or removed.
After this operation, 225 MB disk space will be freed.
Do you want to continue? [Y/n] y
(Reading database ... 149323 files and directories currently installed.)
Removing linux-headers-4.4.0-210-generic (4.4.0-210.242) ...
dpkg: error processing package linux-headers-4.4.0-210-generic (--remove):
unable to securely remove
Not a directory
Removing linux-modules-4.4.0-210-generic (4.4.0-210.242) ...
dpkg: error processing package linux-modules-4.4.0-210-generic (--remove):
unable to securely remove
'/lib/modules/4.4.0-210-generic/kernel/fs/nfs/nfsv4.ko': Not a directory
Removing linux-modules-extra-4.4.0-210-generic (4.4.0-210.242) ...
dpkg: error processing package linux-modules-extra-4.4.0-210-generic
unable to securely remove
'/lib/modules/4.4.0-210-generic/kernel/fs/nfs/blocklayout': Not a directory
Errors were encountered while processing:
E: Sub-process /usr/bin/dpkg returned an error code (1)
apt upgrades are failing as a result of this. I've been slowly reinstating
files (using touch), but is there a way to *genuinely force* apt to
remove/purge when it gets into a state like this?