Exim - Błąd: Too many concurrent SMTP connections

ednet · Październik 28, 2016

Witam

Momentami mam problem z wysyłką mejli na moim serwerze dedykowanym.

W programie pocztowym pojawia się komunikat:

"Too many concurrent SMTP connections"

Oczywiście po restarcie dovecot wysyłka działa prawidłowo przez kilka/naście minut.

Co powinienem poprawić w konfiguracji?

Fragment konfiguracji Exima:

daemon_smtp_ports = 25 : 587 : 465
tls_on_connect_ports = 465

# SET SOME MEANINGFUL LIMITS
# OPTIONAL MODIFICATIONS:
#  These defaults work for us; you may wish to modify them
#  for your environment

message_size_limit = 500M
smtp_receive_timeout = 5m
smtp_accept_max = 1800
smtp_accept_max_per_connection = 1000
message_body_visible = 3000
print_topbitchars = true
deliver_queue_load_max = 15
smtp_connect_backlog = 50
split_spool_directory = yes

Parametry smtp_accept_max i smtp_accept_max_per_connection powiększyłęm do powyższych ale problem się powtórzył.

root@s:~/proc# netstat -plan|grep ':25'|grep ESTAB
tcp        0      0 XXX.XX.236.132:25       117.208.127.54:4265     ESTABLISHED 3699/exim
tcp        0      0 XXX.XX.236.132:25       117.239.235.66:1643     ESTABLISHED 1386/exim
tcp        0    152 XXX.XX.236.132:25       188.51.181.84:56167     ESTABLISHED 3713/exim
tcp        0      0 XXX.XX.236.132:25       14.186.66.101:2595      ESTABLISHED 3503/exim
tcp        0      0 XXX.XXX.22.44:25        103.206.83.68:58203     ESTABLISHED 2977/exim
tcp        0      0 XXX.XXX.22.44:25        116.104.243.203:49238   ESTABLISHED 2979/exim
tcp        0     68 XXX.XX.236.132:25       113.174.165.220:61183   ESTABLISHED 3730/exim
tcp        0     72 XXX.XX.236.132:25       122.176.20.146:54927    ESTABLISHED 3337/exim
tcp        0      0 XXX.XXX.22.44:25        171.232.30.110:59463    ESTABLISHED 3265/exim
tcp        0    248 XXX.XX.236.132:25       14.168.98.110:53031     ESTABLISHED 3690/exim
tcp        0    248 XXX.XX.236.132:25       113.161.38.243:51815    ESTABLISHED 3657/exim
tcp        0    167 XXX.XX.236.132:25       120.88.37.218:52123     ESTABLISHED 3735/exim
tcp        0    248 XXX.XX.236.132:25       125.99.117.42:60166     ESTABLISHED 3663/exim
tcp        0     68 XXX.XX.236.132:25       83.110.107.98:3653      ESTABLISHED -
tcp        0    154 XXX.XX.236.132:25       117.193.46.111:10587    ESTABLISHED 3723/exim
tcp        0     68 XXX.XXX.22.44:25        159.155.144.2:57515     ESTABLISHED 28360/exim
tcp        0      0 XXX.XX.236.132:25       39.51.87.91:9662        ESTABLISHED 19930/exim
tcp        0    248 XXX.XX.236.132:25       182.186.182.0:53212     ESTABLISHED 19122/exim
tcp        0      0 XXX.XX.236.132:25       103.48.186.172:49655    ESTABLISHED 3380/exim
tcp        0      0 XXX.XXX.22.44:25        187.189.71.211:16922    ESTABLISHED 3624/exim
tcp        0     68 XXX.XX.236.132:25       113.160.144.118:59969   ESTABLISHED 3747/exim
tcp        0    150 XXX.XXX.22.44:25        116.90.226.2:53153      ESTABLISHED 8771/exim
tcp        0      0 XXX.XX.236.132:25       14.97.201.121:56058     ESTABLISHED 3711/exim
tcp        0      0 XXX.XX.236.132:25       113.21.64.139:4777      ESTABLISHED 3391/exim
tcp        0     68 XXX.XXX.22.44:25        113.19.16.115:52056     ESTABLISHED 5536/exim
tcp        0     68 XXX.XX.236.132:25       27.109.116.124:50978    ESTABLISHED 3748/exim
tcp        0      0 XXX.XXX.22.44:25        112.215.200.152:40912   ESTABLISHED 3527/exim
tcp        0      0 XXX.XX.236.132:25       112.215.171.190:4551    ESTABLISHED 3640/exim
tcp        0     68 XXX.XX.236.132:25       39.59.41.152:52234      ESTABLISHED 3039/exim
tcp        0      0 XXX.XX.236.132:25       105.57.195.14:1339      ESTABLISHED 3692/exim
tcp        0    154 XXX.XX.236.132:25       117.241.109.53:54197    ESTABLISHED 3740/exim
tcp        0      0 XXX.XX.236.132:25       122.129.126.98:12552    ESTABLISHED 3736/exim
tcp        0      0 XXX.XX.236.132:25       115.84.99.99:7773       ESTABLISHED 3447/exim
tcp        0      0 XXX.XXX.22.44:25        27.3.129.40:63381       ESTABLISHED 3584/exim
tcp        0    248 XXX.XX.236.132:25       59.94.165.23:60726      ESTABLISHED 3741/exim
tcp        0     68 XXX.XX.236.132:25       103.77.16.68:53208      ESTABLISHED 3587/exim
tcp        0    248 XXX.XX.236.132:25       119.148.34.73:50315     ESTABLISHED 3722/exim
tcp        0     68 XXX.XX.236.132:25       182.68.242.121:22945    ESTABLISHED 3731/exim
tcp        0      0 XXX.XXX.22.44:25        182.185.170.189:54143   ESTABLISHED 3681/exim
tcp        0      0 XXX.XXX.22.44:25        118.107.135.180:1920    ESTABLISHED 3467/exim
tcp        0    248 XXX.XX.236.132:25       113.174.184.237:28263   ESTABLISHED 3602/exim
tcp        0      0 XXX.XXX.22.44:25        111.92.47.41:25172      ESTABLISHED 13922/exim
tcp        0      0 XXX.XXX.22.44:25        117.7.237.57:64448      ESTABLISHED 3440/exim
tcp        0      0 XXX.XXX.22.44:25        94.183.196.148:13184    ESTABLISHED 3696/exim
tcp        0      0 XXX.XX.236.132:25       49.156.150.89:3126      ESTABLISHED 3652/exim
tcp        0    152 XXX.XXX.22.44:25        121.54.58.244:18085     ESTABLISHED 3742/exim
tcp        0    152 XXX.XXX.22.44:25        106.76.242.114:19491    ESTABLISHED 2552/exim
tcp        0    154 XXX.XX.236.132:25       161.10.253.251:52978    ESTABLISHED 3721/exim
tcp        0      0 XXX.XX.236.132:25       202.160.38.90:58930     ESTABLISHED 3270/exim
tcp        0    146 XXX.XXX.22.44:25        27.6.53.61:64161        ESTABLISHED 3569/exim
tcp        0    149 XXX.XX.236.132:25       92.50.23.176:11276      ESTABLISHED 6243/exim
tcp        0    154 XXX.XX.236.132:25       117.241.244.70:3235     ESTABLISHED 3739/exim
tcp        0      0 XXX.XX.236.132:25       182.74.223.76:15496     ESTABLISHED 2798/exim
tcp        0    152 XXX.XX.236.132:25       41.191.101.29:64253     ESTABLISHED -
tcp        0    248 XXX.XX.236.132:25       113.161.18.63:41703     ESTABLISHED 4726/exim
tcp        0    248 XXX.XX.236.132:25       180.234.6.247:17189     ESTABLISHED 27753/exim
tcp        0      0 XXX.XX.236.132:25       59.99.228.76:3113       ESTABLISHED 3654/exim
tcp        0     68 XXX.XX.236.132:25       113.188.143.75:30277    ESTABLISHED 3715/exim
tcp        0     68 XXX.XX.236.132:25       124.108.18.66:51960     ESTABLISHED -
tcp        0      0 XXX.XX.236.132:25       146.88.37.36:52093      ESTABLISHED 3728/exim
tcp        0     68 XXX.XX.236.132:25       117.199.171.54:12126    ESTABLISHED -
tcp        0    150 XXX.XX.236.132:25       1.55.116.255:1429       ESTABLISHED 2895/exim
tcp        0    155 XXX.XXX.22.44:25        113.199.255.94:3168     ESTABLISHED 3201/exim
tcp        0     68 XXX.XXX.22.44:25        62.215.98.113:61000     ESTABLISHED 3701/exim
tcp        0      0 XXX.XX.236.132:25       171.249.87.246:63342    ESTABLISHED 3376/exim
tcp        0    152 XXX.XX.236.132:25       5.202.253.122:2398      ESTABLISHED 3749/exim
tcp        0      0 XXX.XX.236.132:25       103.35.101.164:51414    ESTABLISHED 3698/exim
tcp        0      0 XXX.XX.236.132:25       103.214.236.6:62093     ESTABLISHED 3514/exim
tcp        0      0 XXX.XX.236.132:25       171.246.188.98:49572    ESTABLISHED 3117/exim
tcp        0      0 XXX.XX.236.132:25       27.49.32.108:65252      ESTABLISHED 3000/exim
tcp        0      0 XXX.XX.236.132:25       77.246.60.134:50720     ESTABLISHED 3651/exim
tcp        0    248 XXX.XX.236.132:25       202.137.6.90:2772       ESTABLISHED 3710/exim
tcp        0    248 XXX.XX.236.132:25       117.3.46.210:47074      ESTABLISHED 3474/exim
tcp        0     68 XXX.XX.236.132:25       39.59.92.8:1611         ESTABLISHED 23570/exim
tcp        0      0 XXX.XX.236.132:25       116.106.15.225:3627     ESTABLISHED 3064/exim
tcp        0     68 XXX.XX.236.132:25       91.74.61.254:48334      ESTABLISHED -
tcp        0    152 XXX.XX.236.132:25       5.120.111.107:3464      ESTABLISHED 3750/exim
tcp        0     68 XXX.XX.236.132:25       175.100.49.206:44725    ESTABLISHED -
tcp        0      0 XXX.XX.236.132:25       103.249.81.202:53303    ESTABLISHED 3691/exim
tcp        0    248 XXX.XX.236.132:25       117.248.76.210:17050    ESTABLISHED 3686/exim
tcp        0     68 XXX.XXX.22.44:25        39.59.1.175:55747       ESTABLISHED 26429/exim
tcp        0      0 XXX.XXX.22.44:25        210.2.153.114:51497     ESTABLISHED 3669/exim
tcp        0     68 XXX.XX.236.132:25       91.98.51.71:9360        ESTABLISHED 3589/exim
tcp        0     68 XXX.XX.236.132:25       113.162.221.125:63359   ESTABLISHED 3751/exim
tcp        0      0 XXX.XX.236.132:25       175.157.6.255:44944     ESTABLISHED 2624/exim
tcp        0      0 XXX.XX.236.132:25       193.255.129.55:51756    ESTABLISHED 3060/exim
tcp        0     72 XXX.XX.236.132:25       112.196.19.2:56834      ESTABLISHED 3576/exim
tcp        0      0 XXX.XX.236.132:25       171.226.1.178:52795     ESTABLISHED 3403/exim
tcp        0    156 XXX.XX.236.132:25       117.213.232.124:29334   ESTABLISHED 3712/exim
tcp        0     68 XXX.XX.236.132:25       91.185.139.23:19283     ESTABLISHED -
tcp        0      0 XXX.XX.236.132:25       78.38.28.3:61927        ESTABLISHED 3148/exim
tcp        0     68 XXX.XX.236.132:25       117.201.176.245:16342   ESTABLISHED -
tcp        0    248 XXX.XX.236.132:25       182.50.16.87:46694      ESTABLISHED 3674/exim
tcp        0     68 XXX.XXX.22.44:25        182.178.187.154:1795    ESTABLISHED -
tcp        0    164 XXX.XX.236.132:25       111.68.101.169:33063    ESTABLISHED -
tcp        0      0 XXX.XXX.22.44:25        103.239.5.242:52558     ESTABLISHED 2841/exim
tcp        0    149 XXX.XX.236.132:25       14.1.193.243:62822      ESTABLISHED 3717/exim
tcp        0      0 XXX.XXX.22.44:25        116.100.93.176:57140    ESTABLISHED 3384/exim
tcp        0    248 XXX.XX.236.132:25       182.185.231.15:51340    ESTABLISHED 3643/exim
tcp        0    248 XXX.XX.236.132:25       1.53.104.174:1916       ESTABLISHED 3697/exim
tcp        0    248 XXX.XX.236.132:25       203.92.48.162:51673     ESTABLISHED 3716/exim
tcp        0    156 XXX.XX.236.132:25       117.222.200.188:26489   ESTABLISHED 3727/exim
tcp        0     68 XXX.XX.236.132:25       124.41.215.177:60257    ESTABLISHED -
tcp        0     68 XXX.XX.236.132:25       223.182.99.192:11328    ESTABLISHED 3732/exim
tcp        0    163 XXX.XX.236.132:25       117.6.130.181:58137     ESTABLISHED 23723/exim
tcp        0     68 XXX.XX.236.132:25       103.195.97.112:63548    ESTABLISHED -
tcp        0      0 XXX.XX.236.132:25       1.55.57.186:55304       ESTABLISHED 2942/exim
tcp        0      0 XXX.XXX.22.44:25        103.230.104.26:64124    ESTABLISHED 3724/exim
tcp        0      0 XXX.XX.236.132:25       112.215.151.173:47506   ESTABLISHED 3193/exim
tcp        0     68 XXX.XX.236.132:25       27.64.39.153:54033      ESTABLISHED 3738/exim
tcp        0     68 XXX.XX.236.132:25       94.55.55.124:55584      ESTABLISHED -
tcp        0     68 XXX.XX.236.132:25       58.68.101.82:4522       ESTABLISHED -
tcp        0      0 XXX.XXX.22.44:25        116.100.142.11:52253    ESTABLISHED 3402/exim
tcp        0    248 XXX.XX.236.132:25       39.35.224.129:53755     ESTABLISHED 3704/exim
tcp        0      0 XXX.XX.236.132:25       103.196.234.90:55463    ESTABLISHED 3734/exim
tcp        0    152 XXX.XX.236.132:25       117.200.210.0:54504     ESTABLISHED -
tcp        0      0 XXX.XX.236.132:25       5.233.64.10:2494        ESTABLISHED 3612/exim
tcp        0      0 XXX.XX.236.132:25       59.91.159.199:19019     ESTABLISHED 19552/exim
tcp        0      0 XXX.XX.236.132:25       41.72.121.65:28018      ESTABLISHED 3572/exim
tcp        0     68 XXX.XX.236.132:25       59.99.165.27:51254      ESTABLISHED -
tcp        0    156 XXX.XXX.22.44:25        136.185.108.130:33671   ESTABLISHED 2211/exim
tcp        0      0 XXX.XX.236.132:25       110.169.101.118:34872   ESTABLISHED 3635/exim
tcp        0      0 XXX.XXX.22.44:25        116.199.169.58:55265    ESTABLISHED 3021/exim
tcp        0      0 XXX.XX.236.132:25       182.74.211.54:50984     ESTABLISHED 3582/exim
tcp        0     68 XXX.XX.236.132:25       120.59.104.39:49958     ESTABLISHED 19524/exim
tcp        0    248 XXX.XX.236.132:25       203.153.44.24:10963     ESTABLISHED 32199/exim
tcp        0    154 XXX.XX.236.132:25       115.178.26.238:4644     ESTABLISHED 3437/exim
tcp        0     68 XXX.XX.236.132:25       59.94.28.34:51434       ESTABLISHED 3719/exim
tcp        0      0 XXX.XX.236.132:25       111.88.110.67:61319     ESTABLISHED 3086/exim
tcp        0      0 XXX.XX.236.132:25       112.215.153.106:40907   ESTABLISHED 3052/exim
tcp        0    163 XXX.XX.236.132:25       117.6.130.181:58192     ESTABLISHED 25099/exim
tcp        0      0 XXX.XX.236.132:25       103.59.57.24:26434      ESTABLISHED 3109/exim
tcp        0    248 XXX.XX.236.132:25       42.111.103.131:21655    ESTABLISHED 24156/exim
tcp        0    248 XXX.XX.236.132:25       122.179.131.143:52321   ESTABLISHED 3703/exim
tcp        0      0 XXX.XX.236.132:25       116.97.234.212:10171    ESTABLISHED 3036/exim
tcp        0      0 XXX.XX.236.132:25       41.186.56.165:41748     ESTABLISHED 3693/exim
tcp        0      0 XXX.XX.236.132:25       182.64.49.108:29396     ESTABLISHED -
tcp        0    167 XXX.XX.236.132:25       139.194.5.18:51627      ESTABLISHED 3670/exim
tcp        0    248 XXX.XXX.22.44:25        14.165.62.113:52222     ESTABLISHED 3661/exim
tcp        0    182 XXX.XX.236.132:25       115.115.129.116:62447   ESTABLISHED 3733/exim
tcp        0    248 XXX.XXX.22.44:25        202.29.243.169:36031    ESTABLISHED 28339/exim
tcp        0     68 XXX.XX.236.132:25       202.137.208.118:51127   ESTABLISHED 19771/exim
tcp        0    154 XXX.XX.236.132:25       103.195.97.112:63546    ESTABLISHED 3745/exim
tcp        0     68 XXX.XX.236.132:25       14.161.27.208:36955     ESTABLISHED 3720/exim
tcp        0     68 XXX.XXX.22.44:25        118.71.224.162:5219     ESTABLISHED -
tcp        0      0 XXX.XX.236.132:25       202.142.116.245:64323   ESTABLISHED -
tcp        0     68 XXX.XX.236.132:25       14.166.157.131:3448     ESTABLISHED 3708/exim
tcp        0    248 XXX.XX.236.132:25       14.171.245.24:65516     ESTABLISHED 3535/exim
tcp        0    248 XXX.XXX.22.44:25        122.252.232.34:54042    ESTABLISHED 3743/exim
tcp        0      0 XXX.XX.236.132:25       182.74.3.86:1480        ESTABLISHED 3594/exim
tcp        0      0 XXX.XXX.22.44:25        171.61.96.57:13490      ESTABLISHED -
tcp        0      0 XXX.XXX.22.44:25        103.249.7.31:49580      ESTABLISHED -
tcp        0     68 XXX.XX.236.132:25       117.222.80.227:26224    ESTABLISHED -
tcp        0     68 XXX.XXX.22.44:25        39.46.3.205:49636       ESTABLISHED -
tcp        0      0 XXX.XX.236.132:25       1.52.114.161:19459      ESTABLISHED 3623/exim
tcp        0      0 XXX.XX.236.132:25       110.164.198.66:56229    ESTABLISHED 6695/exim
tcp        0    150 XXX.XX.236.132:25       45.121.78.83:27641      ESTABLISHED 3718/exim
tcp        0    148 XXX.XX.236.132:25       113.176.141.112:2379    ESTABLISHED 3695/exim
tcp        0      0 XXX.XX.236.132:25       83.230.188.135:34740    ESTABLISHED 11829/exim
tcp        0      0 XXX.XX.236.132:25       116.99.113.18:50934     ESTABLISHED 2834/exim
tcp        0     68 XXX.XX.236.132:25       117.239.51.81:12904     ESTABLISHED -
tcp        0    248 XXX.XX.236.132:25       105.172.6.216:23487     ESTABLISHED 28711/exim
tcp        0    248 XXX.XXX.22.44:25        223.30.100.254:52282    ESTABLISHED 3435/exim

Październik 28, 2016

Zerknij: https://bobcares.com/blog/how-to-fix-error-421-too-many-concurrent-smtp-connections-in-cpanel-directadmin-servers/

ednet · Październik 28, 2016

dzięki za link, wcześniej już zwiększyłem

smtp_accept_max = 1800
smtp_accept_max_per_connection = 1000

ale czy to nie za dużo?

ile te wartości powinny wynosić? domyślne sa o wiele niższe.

Ed

murgal · Październik 28, 2016

A faktycznie masz tak duży ruch? Może rozsyłasz i jesteś relayem?

Październik 28, 2016

Co z kolejkami /smtp_accept_queue, smtp_accept_queue_per_connection/?

Sprawdź sobie "tą maszynę" np. tu: http://mxtoolbox.com/diagnostic.aspx

Edytowano Październik 28, 2016 przez mariaczi (zobacz historię edycji)

ednet · Październik 28, 2016

Na razie nie ma żadnych problemów, ponieważ Mxtoolbox nie

pokazał nic niepokojącego:

Na chwilę obecną nie ma już błędów, poczekam do jutra lub do poniedziałku, ponieważ najwięcej błędów było w godzinach przedpołudniowych kiedy użytkonwnicy serwera pracują.

Connecting to XXX.XX.52.246

220 s.XXXXX.pl ESMTP Exim 4.80.1 Fri, 28 Oct 2016 13:59:09 +0200 [703 ms]
EHLO PWS3.mxtoolbox.com
250-s.XXXXX.pl Hello pws3.mxtoolbox.com [64.20.227.134]
250-SIZE 524288000
250-8BITMIME
250-PIPELINING
250-AUTH PLAIN LOGIN
250-STARTTLS
250 HELP [703 ms]
MAIL FROM:<supertool@mxtoolbox.com>
250 OK [708 ms]
RCPT TO:<test@example.com>
550 authentication required [708 ms]

PWS3v2 4166ms

murgal · Październik 28, 2016

Mail serwer nie ma u siebie jakiegoś apacha ze skryptami?

Miałem na jednej maszynie Pocztę + jedną WWW i rozsyłał mi toone spamu.

Zaloguj się

Exim - Błąd: Too many concurrent SMTP connections

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