good options for Multiple users on a common email account
Hi,
i ve a mail server to manage with some email accounts but with multiples users (+50) using a common email. it indicates sometimes that it can't connect cause too many connections.
what are the good options to allow a lot of users for a specific account ?
i modifyied these options : auth_worker_max_count = 60 mail_max_userip_connections = 60
is it sufficient ?
dovecot -n :
auth_worker_max_count = 60 mail_location = maildir:/home/%u/Maildir namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } passdb { driver = pam } protocols = " imap" service imap-login { inet_listener imaps { port = 993 ssl = yes } } ssl_cert = </etc/ssl/certs/dovecot.pem ssl_key = # hidden, use -P to show it userdb { driver = passwd } protocol imap { mail_max_userip_connections = 60 }
Regards,
-- patg
"Pat" == Pat G <patgsiosisr@gmail.com> writes:
Pat> i ve a mail server to manage with some email accounts but with Pat> multiples users (+50) using a common email. it indicates Pat> sometimes that it can't connect cause too many connections.
Can you post some log messages from around when this happens? It should be easy enough to generate loadby running abunch of fetchmail processes or other imap CLI tools against those shared accounts.
Pat> what are the good options to allow a lot of users for a specific Pat> account ?
I'm honestly not sure, but it shouldn't care whether it's one account logged in multiple time, or a whole bunch of accounts all accessing their own mailboxes.
Pat> i modifyied these options : Pat> auth_worker_max_count = 60 Pat> mail_max_userip_connections = 60
Pat> is it sufficient ?
Pat> dovecot -n :
Pat> auth_worker_max_count = 60 Pat> mail_location = maildir:/home/%u/Maildir Pat> namespace inbox { Pat> inbox = yes Pat> location = Pat> mailbox Drafts { Pat> special_use = \Drafts Pat> } Pat> mailbox Junk { Pat> special_use = \Junk Pat> } Pat> mailbox Sent { Pat> special_use = \Sent Pat> } Pat> mailbox "Sent Messages" { Pat> special_use = \Sent Pat> } Pat> mailbox Trash { Pat> special_use = \Trash Pat> } Pat> prefix = Pat> } Pat> passdb { Pat> driver = pam Pat> } Pat> protocols = " imap" Pat> service imap-login { Pat> inet_listener imaps { Pat> port = 993 Pat> ssl = yes Pat> } Pat> } Pat> ssl_cert = </etc/ssl/certs/dovecot.pem Pat> ssl_key = # hidden, use -P to show it Pat> userdb { Pat> driver = passwd Pat> } Pat> protocol imap { Pat> mail_max_userip_connections = 60 Pat> }
I would just bump those two numbers up and load test with an IMAP client you can script out. Shouldn't be too hard to do.
John
Hi,
it wasn't enough, then i added the default_process_limit and it was good. No more error
Regards
Le mercredi 23 juin 2021 à 21:13:32 (-0400), John Stoffel a écrit :
"Pat" == Pat G <patgsiosisr@gmail.com> writes:
Pat> i ve a mail server to manage with some email accounts but with Pat> multiples users (+50) using a common email. it indicates Pat> sometimes that it can't connect cause too many connections.
Can you post some log messages from around when this happens? It should be easy enough to generate loadby running abunch of fetchmail processes or other imap CLI tools against those shared accounts.
Pat> what are the good options to allow a lot of users for a specific Pat> account ?
I'm honestly not sure, but it shouldn't care whether it's one account logged in multiple time, or a whole bunch of accounts all accessing their own mailboxes.
Pat> i modifyied these options : Pat> auth_worker_max_count = 60 Pat> mail_max_userip_connections = 60
Pat> is it sufficient ?
Pat> dovecot -n :
Pat> auth_worker_max_count = 60 Pat> mail_location = maildir:/home/%u/Maildir Pat> namespace inbox { Pat> inbox = yes Pat> location = Pat> mailbox Drafts { Pat> special_use = \Drafts Pat> } Pat> mailbox Junk { Pat> special_use = \Junk Pat> } Pat> mailbox Sent { Pat> special_use = \Sent Pat> } Pat> mailbox "Sent Messages" { Pat> special_use = \Sent Pat> } Pat> mailbox Trash { Pat> special_use = \Trash Pat> } Pat> prefix = Pat> } Pat> passdb { Pat> driver = pam Pat> } Pat> protocols = " imap" Pat> service imap-login { Pat> inet_listener imaps { Pat> port = 993 Pat> ssl = yes Pat> } Pat> } Pat> ssl_cert = </etc/ssl/certs/dovecot.pem Pat> ssl_key = # hidden, use -P to show it Pat> userdb { Pat> driver = passwd Pat> } Pat> protocol imap { Pat> mail_max_userip_connections = 60 Pat> }
I would just bump those two numbers up and load test with an IMAP client you can script out. Shouldn't be too hard to do.
John
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On Wed, 23 Jun 2021, Pat G wrote:
i ve a mail server to manage with some email accounts but with multiples users (+50) using a common email. it indicates sometimes that it can't connect cause too many connections.
what are the good options to allow a lot of users for a specific account ?
i modifyied these options : auth_worker_max_count = 60 mail_max_userip_connections = 60
is it sufficient ?
Probably not, but it depends on the mail client they are using. Some mail clients chew up 3 or 5 concurrent connections per session. MacOSX Mail.app will consume all the connections while doing global pattern searching (i.e. if you allow 200, it will open up 200 connections at a time before closing them).
If your users use POP3, then the limits have a good chance of working.
If too many concurrent connections becomes a problem, maybe you can use mailbox sharing rather than single account access.
Joseph Tam <jtam.home@gmail.com>
participants (3)
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John Stoffel
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Joseph Tam
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Pat G