Am 19.08.2013 23:00, schrieb Stan Hoeppner: > On 8/19/2013 7:03 AM, Reindl Harald wrote: >> >> Am 19.08.2013 14:00, schrieb LuKreme: >>> All of a sudden I am getting these errors on one of my accounts: >>> >>> imap-login: Info: Maximum number of connections from user+IP exceeded >>> (mail_max_userip_connections=10) >>> It was working fine last night when I went to bed, and is posting these >>> errors nearly constantly >> >> in case of IMAP 10 is *way* too low! >> >> keep in mind that >> >> * a IMAP client opens one connection *per folder* > > What do you mean by "per folder"? I've been limiting Tbird to 2 IMAP > connections for many years and, unsurprisingly, it never opens more than > two IMAP connections to Dovecot no matter how many folders I access, > tabs I have open, or searches I perform, etc: > > tcp 0 0 192.168.100.9:143 192.168.100.53:1663 ESTABLISHED 13189/imap > tcp 0 0 192.168.100.9:143 192.168.100.53:1672 ESTABLISHED 13192/imap
and it will never check more than 2 folder relieable and in time for new mails > And with the default TB limit of 5 it never opens more than 5 fine - and with Inbox, Sent, Trash, Junk and Drafts it will so with 2 client from the smane NAT your 10 are done > Which clients exhibit this "per folder" connection behavior? > That seems totally unnecessary. may i suggest you read about how IMAP IDLE works? http://forum.emclient.com/emclient/topics/imap_idle_should_open_a_connection_to_each_folder_but_it_does_not http://kb.mozillazine.org/IMAP:_advanced_account_configuration >> * if you have 5 folders and a user with 3 devices (workstation, phone, >> tablet) you are done > > Again, not folder dependent but client configuration dependent. If your > client is RC it never opens more than one connection per user, and > closes the connection after each operation. Roundcube is not a regulary client because with stateless HTTP you hardly can implement IMAP IDLE >> * if you have a few imap-users behind the same NAT you are done > > This isn't correct either. It's user+IP says who? this makes no sense to limit anything relieable hence, a bad guy has no user at all and opens a lot of connections for damage > So you could have 30 connections from 3 users, 100 from 10 users, through > one NAT IP, with a setting of 10 even with your example of 5 default connections you have a problem with the same user owning 3 devices - they most likely sometimes are behind his home NAT and turned on
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