July 2010 - dovecot - dovecot.org

[Dovecot] Deleting Index Files and Expire Tool
by Tom Goerger 19 Jul '10

19 Jul '10

Hi, In order to periodically deal with corrupted index files in Dovecot, we routinely will remove a users .imap folder in order to have the indexes rebuild. This hasn't ever caused a problem previously. However, removing the user's index files seems to break the ability of the expire plugin to update the expire stamp correctly, or expunge mail from the user folder. This seems logical, with the reliance of expire on the index.cache files. In testing, actually emptying the trash (since we're only concerned about Trash folders) resets the mailbox to a degree that the expire tool functions properly again. My question is, is there a better way to handle corrupted cache files? Is there a more graceful way to rebuild these using Dovecot tools? Or is there a more specific index file that can be removed, rather than removing the entire hierarchy? We're using Dovecot 1.1.6, on Solaris 10. -- Tom Goerger University of Minnesota - Internet Services

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Re: [Dovecot] SSL / TLS Problem
by Leander S. 19 Jul '10

19 Jul '10

Thanks for your reply. What do you mean by "pipe" See, I can even connect via the console from the outside: |Notebook [~]$ openssl s_client -CApath ~/.cert/XYZ.com/ -connect XYZ.com:993 CONNECTED(00000003) depth=0 /C=DE/ST=BW/L=City/O=HomeServer GmbH/OU=WebHosting/CN=XYZ.com/emailAddress=admin@XYZ.com verify error:num=18:self signed certificate verify return:1 depth=0 /C=DE/ST=BW/L=City/O=HomeServer GmbH/OU=WebHosting/CN=XYZ.com/emailAddress=admin@XYZ.com verify return:1 --- Certificate chain 0 s:/C=DE/ST=BW/L=City/O=HomeServer GmbH/OU=WebHosting/CN=XYZ.com/emailAddress=admin@XYZ.com i:/C=DE/ST=BW/L=City/O=HomeServer GmbH/OU=WebHosting/CN=XYZ.com/emailAddress=admin@XYZ.com --- Server certificate -----BEGIN CERTIFICATE----- MIIC6TCCAlKgAwIBAgIJAN4Jfaj9QgEhMA0GCSqGSIb3DQEBBQUAMIGqMQswCQYD VQQGEwJERTEbMBkGA1UECBMSQmFkZW4tV3VlcnR0ZW1iZXJnMREwDwYDVQQHEwhO ZXVicm9ubjEWMBQGA1UEChMNTmV0T2NlYW4gR21iSDETMBEGA1UECxMKV2ViSG9z dGluZzEYMBYGA1UEAxMPc2VydmVyLm5ldG9jZWFuMSQwIgYJKoZIhvcNAQkBFhVh ZG1pbkBzZXJ2ZXIubmV0b2NlYW4wHhcNMTAwNzExMTgwMzQ4WhcNMzAwNzA2MTgw MzQ4WjCBqjELMAkGA1UEBhMCREUxGzAZBgNVBAgTEkJhZGVuLVd1ZXJ0dGVtYmVy ZzERMA8GA1UEBxMITmV1YnJvbm4xFjAUBgNVBAoTDU5ldE9jZWFuIEdtYkgxEzAR BgNVBAsTCldlYkhvc3RpbmcxGDAWBgNVBAMTD3NlcnZlci5uZXRvY2VhbjEkMCIG CSqGSIb3DQEJARYVYWRtaW5Ac2VydmVyLm5ldG9jZWFuMIGfMA0GCSqGSIb3DQEB AQUAA4GNADCBiQKBgQDFiBWAJ893Ocm4dooDHHkNRZcvC4N5qjfx1wywoS2DlnV4 GwBQPYcyewx5ptcjqq863r3rvHhbNeJbcnh8jNATTxto8r2NkadwccXw4LtqpfAS A2dhuYt8zKhiI2tlfZNCzSzDmqid4NuxKiNQGNB6OU6/x2vp0ZFTwstIr7TMAwID AQABoxUwEzARBglghkgBhvhCAQEEBAMCBkAwDQYJKoZIhvcNAQEFBQADgYEAtlPa GQ4Weyi9vlIDLL4PgGsNk4sR4Ca2gbYLTd5HaSkww+BKIfz1OkFEmsNozNSo19PJ WaOp7exCN23j5Z/+qfZSGgUAelJHxRJ0Mc8YmtTuLKaNHxWYBJit3T3n1lbuFENe vdh8oCo6GKjjm7RkbkEvTvdzrOdztXZt3Ij4gLE= -----END CERTIFICATE----- subject=/C=DE/ST=BW/L=City/O=HomeServer GmbH/OU=WebHosting/CN=XYZ.com/emailAddress=admin@XYZ.com issuer=/C=DE/ST=BW/L=City/O=HomeServer GmbH/OU=WebHosting/CN=XYZ.com/emailAddress=admin@XYZ.com --- No client certificate CA names sent --- SSL handshake has read 1313 bytes and written 325 bytes --- New, TLSv1/SSLv3, Cipher is DHE-RSA-AES256-SHA Server public key is 1024 bit Secure Renegotiation IS NOT supported Compression: NONE Expansion: NONE SSL-Session: Protocol : TLSv1 Cipher : DHE-RSA-AES256-SHA Session-ID: 54DC3526DB721308D460CBAF21D562958D34ED146332F0B4ACBE9E1311633ED1 Session-ID-ctx: Master-Key: 1BCB1FA49855FC38ACB52C2CD8D54594C006116220D66FA0E74F68663AFE3FC09086B9BFB1FE0E515681A2E0DC7C1AFC Key-Arg : None Start Time: 1278952607 Timeout : 300 (sec) Verify return code: 18 (self signed certificate) --- * OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE AUTH=CRAM-MD5] NetOcean MailSystem ^C Notebook [~]$| Am 12.07.10 19:11, schrieb Daniel Petre: > dude, whats the pipe at the end of the mail.key location? > >> It's always the same when it fails ... >> >> >> And this is how my dovecot.conf looks like: >> >> [...] >> >> |## >> ## SSL settings >> ## >> ssl = yes >> ssl_cert_file = /etc/ssl/mail/mail.cert >> ssl_key_file = /etc/ssl/mail/mail.key| >> >> [...] >> >> >> Thank you

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[Dovecot] Plugins/Virtual for save searches & last 30 days incomming Email
by No body ist Perfect 19 Jul '10

19 Jul '10

Hello! How can i configure the virtal-dovecot (virtal folder) file for search the complete Mailbox for email not older as 30 Days ? Thanks a lot

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[Dovecot] Proxy IMAP/POP/ManageSieve/SMTP in a large cluster enviroment
by Aliet Santiesteban Sifontes 19 Jul '10

19 Jul '10

Hi to all in the list, we are trying to do some tests lab for a large scale mail system having this requirements: - Scale to maybe 1million users(Only for testing). - Server side filters. - User quotas. - High concurrency. - High performance and High Availability. We plan to test this using RHEL5 and maybe RHEL6. As a storage we are going to use an HP EVA 8400 FC(8 GB/s) We defined this functional roles. 1- Outgoing SMTP gateway servers. - Load balanced with Piranha LVS using Direct Routing. - ( n servers)RHEL5/6 using Postfix Latest version Amavisd-new Clamav Spamassasin maybe some other filters. 2- Incomming SMTP gateway servers. - Load balanced with Piranha LVS using Direct Routing. - RHEL5/6 using Postfix Latest version Amavisd-new Clamav Spamassasin( n servers) maybe some other filters. 3- Webmail Cluster farm. - Load balanced with Piranha LVS using Direct Routing. - ( n servers)RHEL5/6 using RHCS Active/Active. Apache2 PHP5 Horde. 4- Openldap load balanced openldap cluster. - Load balanced with Piranha LVS using Direct Routing. - ( n servers)RHEL5/6 using Openldap. 5- IMAP/POP/ManageSieve/SMTP Proxy or Director. - Load balanced with Piranha LVS using Direct Routing. - ( n servers)RHEL5/6 using Dovecot - Postfix(Director or Proxy). 6- Mail backend. - ( n servers)RHEL5/6 using Dovecot. Now for functional role 6 "Mail Backend" we have some dilemmas. - Recommended scalable filesystem to use for such scenario(Clustered or not). -GFS2?? We have very bad experiences with GFS1 and maildir, GFS2 doesn't seems to improve this also. Using some techniques for session afinity with a backend server seems to help with the locking problems of GFS and the cache. Using GFS many IMAP SMTP servers can in parallel write or read to user mailboxes, if GFS can perform well we prefer this, will have to proxy o use director for the cache problem. - Ext4, Ext3 well tested with many setups but only one backend server can access one ext4 lun, so we have to proxy a user always to a ip backend address or VIP in a case of failure cluster software has to move the server to another node, the cluster service is formed by a IP Address and one or many Luns wich moves from node to node in a case of failure. - Recommended scalable method for partition divition. - Directory Hashing(How it actually works the theory behind this), we see the wiki but we need to understand the theory to balance the directory structure. - Using some criteria ex Lun1(a-h users), Lun2(i-m users).... - Proxy or Director is a must for a Clustered Filsystem or for the solution of a user belonging to one server. - In case we use a Proxy with dovecot we know we can use it with IMAP/POP but are not sure for ManageSieve and more important for SMTP. The question is, how can we proxy for the same user IMAP/POP/ManageSieve and SMTP delivery to mailbox at the same time, can the incoming mail gateways send the email to the proxy servers and dovecot proxy the request for smtp or lmtp appply the same proxy criteria that uses for the protocols IMAP and POP and send the email to the correct backend server and this server do the final delivery?? I mean proxy all the protocols for a user IMAP/POP/SMTP-LMTP?? Any example... Right now we have doubts on this stuff, we are really going to appreciate any help or advice on this... best regards

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[Dovecot] Haha wow, thats freakin cool... mdbox
by Brandon Lamb 19 Jul '10

19 Jul '10

It didnt really click until I had a "ls -ald *" on watch while I moved messages around folders using mdbox... I moved about 200 first to an Archive folder, and scratched my head wondering why i didnt see any new m.* files being created after the move. So then I moved some 5k other messages from other folders to my archive folder... Then it dawned on me, how damn cool, the data never changes, dovecot just updates its index of what folder the message is in?! That is awesome! Also, I ended up answering my own question on the 2m mdbox_rotate_size, if a 10 meg email comes through it will write a 10 meg file, so thats cool too.

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[Dovecot] dsync segmentation fault
by Brandon Lamb 19 Jul '10

19 Jul '10

dsync -u brandon(a)olypen.com mirror mdbox~/mdbox Segmentation fault Took me 3 tries before I noticed the missing colon after mdbox

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[Dovecot] mdbox, mdbox_rotate_size 2m default
by Brandon Lamb 19 Jul '10

19 Jul '10

Anyone else test using different values? Was 2M chosen as a default based on anything specific? Is there any kind of known range where performance starts to go downhill if its greater than x or less than y? Im curious if there would be any obvious reason why I shouldnt set it to 5-10 megs

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[Dovecot] users can not login
by Daminto Lie 19 Jul '10

19 Jul '10

Hi, I was wondering if I could get some help here. Recently, I decided I want to move from Windows XP Pro OS to a Linux OS such as Ubuntu. I am new to Linux OS but willing to learn. I have installed Ubuntu Server 10.04, Apache2, MySQL5, PHPMyAdmin, Postfix, DoveCot and Squirrelmail on my server. I have checked them all and they are all up and running at the moment. Now, what I am trying to do here is to add a couple of users and see whether they can login to squirrelmail. The result is none of those two users are able to login. I went to check the mail.log and the error message is as follows Ubuntu-MailServer dovecot: imap-login: Aborted login (auth failed, 1 attempts): user=<david.keith>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, secured My silly question is I do not quite understand what the above error means. How do i enable users to login and test to see if they can send and receive emails. Users can login via squirrelmail. Any help would be greatly appreciated.

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[Dovecot] pam needs root with 2.0rc2 on Solaris?
by Laurent Blume 19 Jul '10

19 Jul '10

Hello all, I have a question using PAM to authenticate on Solaris 10, with 2.0rc2. I need to set the user for auth-worker to root, else it will return "Unknown user". Is that expected? I'm using PAM, so why does it need access to /etc/shadow? TIA! Laurent service auth-worker { # Auth worker process is run as root by default, so that it can access # /etc/shadow. If this isn't necessary, the user should be changed to # $default_internal_user. user = root #user = dovecot } Jul 18 09:59:31 tiphaine dovecot: [ID 583609 mail.info] auth: pam(user,127.0.0.1): unknown user

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[Dovecot] how configure dovecot for not case sensitive login
by Wilberth Perez 19 Jul '10

19 Jul '10

Any knows how can say to dovecot that Login = user and Login = User are the same? Thanks.

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