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* IMAP: Update role to Debian Buster.Guilhem Moulin2020-05-192
| | | | | | | | For `ssl_cipher_list` we pick the suggested value from https://ssl-config.mozilla.org/#server=dovecot&version=2.3.9&config=intermediate&openssl=1.1.1d At the moment it's equivalent (modulo order) to adding ‘EDH+AESGCM+aRSA’ to ‘EECDH+AESGCM:EECDH+CHACHA20!MEDIUM!LOW!EXP!aNULL!eNULL’.
* dovecot: raise default_vsz_limit from 256MB to 512MB.Guilhem Moulin2019-05-231
| | | | | | | | | This avoids lmtp errors like Error: mmap(size=0) failed with file […] dbox-Mails/dovecot.index.cache: Cannot allocate memory See https://www.dovecot.org/list/dovecot/2012-August/137569.html and https://www.dovecot.org/list/dovecot/2011-December/132455.html .
* Update 'IMAP', 'MSA' and 'LDAP-provider' roles to Debian Stretch.Guilhem Moulin2018-12-092
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* postfix: remove explicit default 'mail_owner = postfix'.Guilhem Moulin2018-12-061
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* Postfix: replace cdb & btree tables with lmdb ones.Guilhem Moulin2018-12-031
| | | | Cf. lmdb_table(5).
* Dovecot: Explicitly disable LDAP.Guilhem Moulin2016-12-081
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* postfix: Remove obsolete templates tls_policy/relay_clientcerts.Guilhem Moulin2016-07-121
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* postfix: commit the master.cf symlinks.Guilhem Moulin2016-07-121
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* Postfix lists/MDA instances: only include the MX:es' IPs in $mynetworks.Guilhem Moulin2016-07-101
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* Route all internal SMTP traffic through IPsec.Guilhem Moulin2016-07-101
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* Postfix: avoid hardcoding the instance names.Guilhem Moulin2016-07-101
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* Postfix: don't share the master.cf between the instances.Guilhem Moulin2016-07-101
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* postfix: Don't explicitly set inet_interfaces=all as it's the default.Guilhem Moulin2016-07-101
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* dovecot: don't listen on the IP dedicated for IPSec when there is a single host.Guilhem Moulin2016-05-231
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* dovecot: also listen on the virtual IP dedicated to IPSec.Guilhem Moulin2016-05-221
| | | | | | (On port 143.) Moreover, add the whole IPSec virtual subnet to ‘login_trusted_networks’ since our IPSec tunnels provide end-to-end encryption and we therefore don't need the extra SSL/TLS protection.
* spamassassin: list our IPSec subnet in trusted_networks.Guilhem Moulin2016-05-221
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* postfix: Update to recommended TLS settings.Guilhem Moulin2016-05-181
| | | | | | | | Following Viktor Dukhovni's 2015-08-06 recommendation http://article.gmane.org/gmane.mail.postfix.user/251935 (We're using stronger ciphers and protocols in our own infrastructure.)
* postfix: unset 'smtpd_tls_session_cache_database'.Guilhem Moulin2016-05-181
| | | | | | Following Viktor Dukhovni's 2015-08-06 recommendation for Postfix >= 2.11 http://article.gmane.org/gmane.mail.postfix.user/251935
* Move /etc/ssl/private/dhparams.pem to /etc/ssl/dhparams.pem and make it public.Guilhem Moulin2016-05-181
| | | | | | | | | | Ideally we we should also increase the Diffie-Hellman group size from 2048-bit to 3072-bit, as per ENISA 2014 report. https://www.enisa.europa.eu/publications/algorithms-key-size-and-parameters-report-2014 But we postpone that for now until we are reasonably certain that older client won't be left out.
* Remove SMTP message size limit on non public MTAs.Guilhem Moulin2016-03-211
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* Postfix TLS policy: Store the fingerprint of the cert's pubkey, not of the ↵Guilhem Moulin2015-12-031
| | | | cert itself.
* Fix address verification probes on the MSA.Guilhem Moulin2015-09-161
| | | | | Put all relay restrictions under smtpd_relay_restrictions and leave smtpd_recipient_restrictions empty, since we don't do DNSBL.
* logjam mitigation.Guilhem Moulin2015-06-071
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* Upgrade Dovecot config to Jessie.Guilhem Moulin2015-06-071
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* Remove reject_unknown_sender_domain from the MDA and outgoing SMTP.Guilhem Moulin2015-06-071
| | | | | | | | | | We already removed it from the MX:es (see 32e605d4); we need to remove it from the MDA and outgoing SMTP as well, otherwise mails could bounce or get stuck in the middle (the're rejected with 450: deferred by default). However we can keep the restriction on the entry points (MSA and webmail).
* Hash certs using a lookup in the template instead of add a new task.Guilhem Moulin2015-06-071
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* Fix $smtpd_sender_restrictions.Guilhem Moulin2015-06-071
| | | | | | | | | | | | On the MDA the domain is our 'mda.fripost.org', there is no need to perform an extra DNS lookup. The MSA does not perform local or virtual delivery, but relays everything to the outgoing SMTP proxy. On the MX, there is no need to check for recipient validity as we are the final destination; but unsure that the RCPT TO address is a valid recipient before doing the greylisting.
* Perform the alias resolution and address validation solely on the MX:es.Guilhem Moulin2015-06-071
| | | | | We can therefore spare some lookups on the MDA, and use static:all instead.
* Increase the timeout in the smtpd waiting for the reinjection from amavis.Guilhem Moulin2015-06-071
| | | | | | | | SMTP client connection caching was introduced in 2.6.0: the SMTP session is held for the next task (in adaptative mode, only when there was a delay of only 5s between the two previous mails), but Postfix will terminate it if the next mail doesn't come soon enough, or if amavis does't terminate it itself (usually after 15s).
* Tell vim the underlying filetype of templates for syntax highlighting.Guilhem Moulin2015-06-071
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* Install amavisd-new on the outgoing SMTP proxy.Guilhem Moulin2015-06-072
| | | | For DKIM signing and virus checking.
* Replace IPSec tunnels by app-level ephemeral TLS sessions.Guilhem Moulin2015-06-072
| | | | | For some reason giraff doesn't like IPSec. App-level TLS sessions are less efficient, but thanks to ansible it still scales well.
* Outgoing SMTP proxy.Guilhem Moulin2015-06-071
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* Assume a DNS entry for each role.Guilhem Moulin2015-06-072
| | | | | | E.g., ldap.fripost.org, ntp.fripost.org, etc. (Ideally the DNS zone would be provisioned by ansible, too.) It's a bit unclear how to index the subdomains (mx{1,2,3}, etc), though.
* Decongestion potential bottlenecks on trivial_rewrite(8).Guilhem Moulin2015-06-071
| | | | | | | | | | | | | Which might be caused by slow LDAP lookups in transport_maps. Instead, we alias each addresses for which we want a custom transport to a dedicated "dummy" domain, and use a static (CDB) transport_maps to map said domains to their transport; the receiver can then use canonical(8) to restore the original envelope recipient. Since the alias resolution is performed by cleanup(8), which can run in parallel with other instances, it should decongestion bottlenecks under heavy loads. So far only the MX:es have been decongestioned. The list manager and the MDA should be treated as well.
* Make the *_maps file names uniform.Guilhem Moulin2015-06-071
| | | | That is, don't put a leading virtual_ or a trailing _maps in file names.
* Fix the catch-all resolution again.Guilhem Moulin2015-06-071
| | | | | | | | | | | | | | | | | | | | We introduce a limitation on the domain-aliases: they can't have children (e.g., lists or users) any longer. The whole alias resolution, including catch-alls and domain aliases, is now done in 'virtual_alias_maps'. We stop the resolution by returning a dummy alias A -> A for mailboxes, before trying the catch-all maps. We're still using transport_maps for lists. If it turns out to be a bottleneck due to the high-latency coming from LDAP maps, (and the fact that there is a single qmgr(8) daemon), we could rewrite lists to a dummy subdomain and use a static transport_maps instead: virtual_alias_maps: mylist@example.org -> mylist#example.org@mlmmj.localhost.localdomain transport_maps: mlmmj.localhost.localdomain mlmmj:
* Excplicitely make local services run on localhost.Guilhem Moulin2015-06-071
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* typoGuilhem Moulin2015-06-071
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* wibbleGuilhem Moulin2015-06-071
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* Configure the content filter.Guilhem Moulin2015-06-073
| | | | | | | | | | | Antispam & antivirus, using ClamAV and SpamAssassin through Amavisd-new. Each user has his/her amavis preferences, and own Bayes filter (to maximize privacy). One question remains, though: how to set spamassassin's trusted_networks / internal_networks / msa_networks? It seems not obivious to get it write with IPSec and dynamic IPs. (Cf. https://wiki.apache.org/spamassassin/AwlWrongWay)
* Configure the Mail Delivery Agent.Guilhem Moulin2015-06-071