I have been haunted by the following error message or months, that we
see using Thunderbird.
Unable to connect to your IMAP server.
You may have exceeded the maximum number of connections to this server.
If so, use the Advanced IMAP Server Settings dialogue to reduce the
number of cached connections.
If I change my location, via a VPN, the error message goes away and I
can connect.
I have edited my /etc/dovcot/conf.d/20-imap.conf file by adding the
following:
protocol imap {
? # Space separated list of plugins to load (default is global
mail_plugins).
? mail_plugins = $mail_plugins imap_quota
? # Maximum number of IMAP connections allowed for a user from each IP
address.
? # NOTE: The username is compared case-sensitively.
? mail_max_userip_connections = 500
}
And, I still get the error message. I know myself, I have about 8-9
accounts, some with as many as 10 folders (I know each one count's as
it's own mailbox), as does my partner--who would access the internet
from my IP.
Does that number really have to be like 10,000, or something? If so, why
does it start out so small in the first place. If not, what else could I
do to avoid this message going forward??
I have tried a lot of different things, still no success. =(
here is my dove -n if anyone could help that would be great:
# 2.2.27 (c0f36b0): /etc/dovecot/dovecot.conf
# Pigeonhole version 0.4.16 (fed8554)
# OS: Linux 4.9.0-12-amd64 x86_64 Debian 9.12
auth_debug = yes
auth_debug_passwords = yes
auth_mechanisms = plain login
auth_verbose = yes
auth_verbose_passwords = yes
mail_home = /var/mail/vmail/%d/%n
mail_location = maildir:~/Mail
mail_max_userip_connections = 500
mail_plugins = " quota"
mail_privileged_group = vmail
managesieve_notify_capability = mailto
managesieve_sieve_capability = fileinto reject envelope
encoded-character vacation subaddress comparator-i;ascii-numeric
relational regex imap4flags copy include variables body enotify
environment mailbox date index ihave duplicate mime foreverypart extracttext
namespace inbox {
? inbox = yes
? location ? mailbox Archive {
??? auto = subscribe
??? special_use = \Archive
? }
? mailbox Drafts {
??? auto = subscribe
??? special_use = \Drafts
? }
? mailbox Junk {
??? auto = subscribe
??? special_use = \Junk
? }
? mailbox Sent {
??? auto = subscribe
??? special_use = \Sent
? }
? mailbox "Sent Messages" {
??? special_use = \Sent
? }
? mailbox Trash {
??? auto = subscribe
??? special_use = \Trash
? }
? prefix }
passdb {
? args = /etc/dovecot/dovecot-sql.conf.ext
? driver = sql
}
plugin {
? quota = maildir:User quota
? quota_grace = 10%%
? quota_rule = *:storage=10G
? quota_rule2 = Trash:storage=+1G
? quota_status_overquota = 552 5.2.2 Mailbox is full
? quota_warning = storage=95%% quota-warning 95 %u
? quota_warning2 = storage=80%% quota-warning 80 %u
? sieve = ~/.dovecot.sieve
? sieve_after = /etc/dovecot/sieve/spamfilter.sieve
? sieve_dir = ~/sieve
}
protocols = " imap lmtp sieve"
service auth {
? unix_listener /var/spool/postfix/private/auth {
??? group = postfix
??? mode = 0666
??? user = postfix
? }
}
service imap-login {
? inet_listener imaps {
??? port = 993
??? ssl = yes
? }
}
service lmtp {
? unix_listener /var/spool/postfix/private/dovecot-lmtp {
??? group = postfix
??? mode = 0600
??? user = postfix
? }
}
ssl = required
ssl_cert = </etc/letsencrypt/live/little-beak.com/fullchain.pem
ssl_key =? # hidden, use -P to show it
userdb {
? args = /etc/dovecot/dovecot-sql.conf.ext
? driver = sql
}
protocol lmtp {
? mail_plugins = " quota sieve"
? postmaster_address = *****@little-beak.com
}
protocol lda {
? mail_plugins = " quota sieve"
}
protocol imap {
? mail_max_userip_connections = 500
? mail_plugins = " quota imap_quota"
}
protocol sieve {
? mail_max_userip_connections = 500
}
On 27.02.20 18:54, Esteban L wrote:> I have been haunted by the following error message or months, that we
> see using Thunderbird.
>
> Unable to connect to your IMAP server.
>
> You may have exceeded the maximum number of connections to this server.
> If so, use the Advanced IMAP Server Settings dialogue to reduce the
> number of cached connections.
>
> If I change my location, via a VPN, the error message goes away and I
> can connect.
>
> I have edited my /etc/dovcot/conf.d/20-imap.conf file by adding the
> following:
>
>
> protocol imap {
> ? # Space separated list of plugins to load (default is global
> mail_plugins).
> ? mail_plugins = $mail_plugins imap_quota
>
> ? # Maximum number of IMAP connections allowed for a user from each IP
> address.
> ? # NOTE: The username is compared case-sensitively.
> ? mail_max_userip_connections = 500
> }
>
>
> And, I still get the error message. I know myself, I have about 8-9
> accounts, some with as many as 10 folders (I know each one count's as
> it's own mailbox), as does my partner--who would access the internet
> from my IP.
>
> Does that number really have to be like 10,000, or something? If so, why
> does it start out so small in the first place. If not, what else could I
> do to avoid this message going forward??
>
>
>
>
<!doctype html>
<html>
<head>
<meta charset="UTF-8">
</head>
<body>
<div>
Is your server behind proxy maybe? Can you see in logs that you get different
IPs?
</div>
<div>
<br>
</div>
<div>
Maybe check with `doveadm who` how many connections you have?
</div>
<div>
<br>
</div>
<div>
Aki
</div>
<blockquote type="cite">
<div>
On 27/02/2020 22:44 Esteban L <
<a
href="mailto:esteban@little-beak.com">esteban@little-beak.com</a>>
wrote:
</div>
<div>
<br>
</div>
<div>
<br>
</div>
<div>
I have tried a lot of different things, still no success. =(
</div>
<div>
<br>
</div>
<div>
here is my dove -n if anyone could help that would be great:
</div>
<div>
<br>
</div>
<div>
<br>
</div>
<div>
# 2.2.27 (c0f36b0): /etc/dovecot/dovecot.conf
</div>
<div>
# Pigeonhole version 0.4.16 (fed8554)
</div>
<div>
# OS: Linux 4.9.0-12-amd64 x86_64 Debian 9.12
</div>
<div>
auth_debug = yes
</div>
<div>
auth_debug_passwords = yes
</div>
<div>
auth_mechanisms = plain login
</div>
<div>
auth_verbose = yes
</div>
<div>
auth_verbose_passwords = yes
</div>
<div>
mail_home = /var/mail/vmail/%d/%n
</div>
<div>
mail_location = maildir:~/Mail
</div>
<div>
mail_max_userip_connections = 500
</div>
<div>
mail_plugins = " quota"
</div>
<div>
mail_privileged_group = vmail
</div>
<div>
managesieve_notify_capability = mailto
</div>
<div>
managesieve_sieve_capability = fileinto reject envelope
</div>
<div>
encoded-character vacation subaddress comparator-i;ascii-numeric
</div>
<div>
relational regex imap4flags copy include variables body enotify
</div>
<div>
environment mailbox date index ihave duplicate mime foreverypart extracttext
</div>
<div>
namespace inbox {
</div>
<div>
inbox = yes
</div>
<div>
location </div>
<div>
mailbox Archive {
</div>
<div>
auto = subscribe
</div>
<div>
special_use = \Archive
</div>
<div>
}
</div>
<div>
mailbox Drafts {
</div>
<div>
auto = subscribe
</div>
<div>
special_use = \Drafts
</div>
<div>
}
</div>
<div>
mailbox Junk {
</div>
<div>
auto = subscribe
</div>
<div>
special_use = \Junk
</div>
<div>
}
</div>
<div>
mailbox Sent {
</div>
<div>
auto = subscribe
</div>
<div>
special_use = \Sent
</div>
<div>
}
</div>
<div>
mailbox "Sent Messages" {
</div>
<div>
special_use = \Sent
</div>
<div>
}
</div>
<div>
mailbox Trash {
</div>
<div>
auto = subscribe
</div>
<div>
special_use = \Trash
</div>
<div>
}
</div>
<div>
prefix </div>
<div>
}
</div>
<div>
passdb {
</div>
<div>
args = /etc/dovecot/dovecot-sql.conf.ext
</div>
<div>
driver = sql
</div>
<div>
}
</div>
<div>
plugin {
</div>
<div>
quota = maildir:User quota
</div>
<div>
quota_grace = 10%%
</div>
<div>
quota_rule = *:storage=10G
</div>
<div>
quota_rule2 = Trash:storage=+1G
</div>
<div>
quota_status_overquota = 552 5.2.2 Mailbox is full
</div>
<div>
quota_warning = storage=95%% quota-warning 95 %u
</div>
<div>
quota_warning2 = storage=80%% quota-warning 80 %u
</div>
<div>
sieve = ~/.dovecot.sieve
</div>
<div>
sieve_after = /etc/dovecot/sieve/spamfilter.sieve
</div>
<div>
sieve_dir = ~/sieve
</div>
<div>
}
</div>
<div>
protocols = " imap lmtp sieve"
</div>
<div>
service auth {
</div>
<div>
unix_listener /var/spool/postfix/private/auth {
</div>
<div>
group = postfix
</div>
<div>
mode = 0666
</div>
<div>
user = postfix
</div>
<div>
}
</div>
<div>
}
</div>
<div>
service imap-login {
</div>
<div>
inet_listener imaps {
</div>
<div>
port = 993
</div>
<div>
ssl = yes
</div>
<div>
}
</div>
<div>
}
</div>
<div>
service lmtp {
</div>
<div>
unix_listener /var/spool/postfix/private/dovecot-lmtp {
</div>
<div>
group = postfix
</div>
<div>
mode = 0600
</div>
<div>
user = postfix
</div>
<div>
}
</div>
<div>
}
</div>
<div>
ssl = required
</div>
<div>
ssl_cert = </etc/letsencrypt/live/little-beak.com/fullchain.pem
</div>
<div>
ssl_key = # hidden, use -P to show it
</div>
<div>
userdb {
</div>
<div>
args = /etc/dovecot/dovecot-sql.conf.ext
</div>
<div>
driver = sql
</div>
<div>
}
</div>
<div>
protocol lmtp {
</div>
<div>
mail_plugins = " quota sieve"
</div>
<div>
postmaster_address =
<a
href="mailto:*****@little-beak.com">*****@little-beak.com</a>
</div>
<div>
}
</div>
<div>
protocol lda {
</div>
<div>
mail_plugins = " quota sieve"
</div>
<div>
}
</div>
<div>
protocol imap {
</div>
<div>
mail_max_userip_connections = 500
</div>
<div>
mail_plugins = " quota imap_quota"
</div>
<div>
}
</div>
<div>
protocol sieve {
</div>
<div>
mail_max_userip_connections = 500
</div>
<div>
}
</div>
<div>
<br>
</div>
<div>
<br>
</div>
<div>
On 27.02.20 18:54, Esteban L wrote:
</div>
<blockquote type="cite">
<div>
I have been haunted by the following error message or months, that we
</div>
<div>
see using Thunderbird.
</div>
</blockquote>
<blockquote type="cite">
<div>
Unable to connect to your IMAP server.
</div>
</blockquote>
<blockquote type="cite">
<div>
You may have exceeded the maximum number of connections to this server.
</div>
<div>
If so, use the Advanced IMAP Server Settings dialogue to reduce the
</div>
<div>
number of cached connections.
</div>
</blockquote>
<blockquote type="cite">
<div>
If I change my location, via a VPN, the error message goes away and I
</div>
<div>
can connect.
</div>
</blockquote>
<blockquote type="cite">
<div>
I have edited my /etc/dovcot/conf.d/20-imap.conf file by adding the
</div>
<div>
following:
</div>
</blockquote>
<div>
>
</div>
<blockquote type="cite">
<div>
protocol imap {
</div>
<div>
# Space separated list of plugins to load (default is global
</div>
<div>
mail_plugins).
</div>
<div>
mail_plugins = $mail_plugins imap_quota
</div>
</blockquote>
<blockquote type="cite">
<div>
# Maximum number of IMAP connections allowed for a user from each IP
</div>
<div>
address.
</div>
<div>
# NOTE: The username is compared case-sensitively.
</div>
<div>
mail_max_userip_connections = 500
</div>
<div>
}
</div>
</blockquote>
<div>
>
</div>
<blockquote type="cite">
<div>
And, I still get the error message. I know myself, I have about 8-9
</div>
<div>
accounts, some with as many as 10 folders (I know each one count's as
</div>
<div>
it's own mailbox), as does my partner--who would access the internet
</div>
<div>
from my IP.
</div>
</blockquote>
<blockquote type="cite">
<div>
Does that number really have to be like 10,000, or something? If so, why
</div>
<div>
does it start out so small in the first place. If not, what else could I
</div>
<div>
do to avoid this message going forward??
</div>
</blockquote>
<div>
>
</div>
<div>
>
</div>
<div>
>
</div>
</blockquote>
<div>
<br>
</div>
<div class="io-ox-signature">
<pre>---
Aki Tuomi</pre>
</div>
</body>
</html>