======== Required information ====
- iRedMail version: 0.9.0
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Linux/BSD distribution name and version: Ubuntu Server 14.04
- Related log if you're reporting an issue:
====
Hello guys.
Please help.

We have VPS 1 core\1GB RAM (with average usage about 800-850, but sometimes upto 900MB).
iRedMail + site in development where just I have access.
Once I installed iRedMail everything was ok, (except some issues which I resolved because of sharing an experience of others users on this forum). Then I made few boxes, sended 10's test emails - sending\receiving was ok.

Yerstaday I made new accounts so currently there are 13 boxes and here I faced a problem - people cant connect to their boxes both via Outlook and via web-interface. Web browser says "Cant find a page". I aslo cant open a site (which is in development state). Via SSH I can connect to the server, tried to restart such services as php,apache, postfix & dovecot - didnt help. Just the server reboot helps but just for few mins, then again people cant use emails. If all ppls are not trying to work with mails simultheniously, then 1-2-3 people have no issues.

I also started to receive lots of errors to postmaster@ box.

Subject: Cron <sogo@mail> /usr/sbin/sogo-ealarms-notify

Could not initialise iconv() for UTF16, using UCS-2
Using characters outside 16 bits may give bad results.
: Uncaught exception NSInternalInconsistencyException, reason: Unable to determine current user name
___________

Subject: Cron <sogo@mail> /usr/sbin/sogo-tool expire-sessions 30

Error (objc-load):/usr/lib/GNUstep/SoProducts-4.9/SoCore.sxp/./SoCore: failed to map segment from shared object: Cannot allocate memory
[so-product-registry] could not load product: SoCore
Error (objc-load):/usr/lib/GNUstep/GDLAdaptors-4.9/MySQL.gdladaptor/./MySQL: failed to map segment from shared object: Cannot allocate memory
2015-02-13 14:01:05.112 sogo-tool[5512] Cannot load adaptor bundle 'MySQL'
/usr/sbin/sogo-tool: Uncaught exception InvalidAdaptorBundleException, reason: Cannot load adaptor bundle 'MySQL'
___________

Subject: Cron <www-data@mail> [ -x /usr/share/awstats/tools/update.sh ] && /usr/share/awstats/tools/update.sh

Error while processing /etc/awstats/awstats.smtp.conf
Create/Update database for config "/etc/awstats/awstats.smtp.conf" by AWStats version 7.2 (build 1.992)
From data in log file "perl /usr/share/doc/awstats/examples/maillogconvert.pl standard < /var/log/mail.log |"...
Error: Couldn't open server log file "perl /usr/share/doc/awstats/examples/maillogconvert.pl standard < /var/log/mail.log |" : Cannot allocate memory
Setup ('/etc/awstats/awstats.smtp.conf' file, web server or permissions) may be wrong.
Check config file, permissions and AWStats documentation (in 'docs' directory).
___________

Subject: Cron <root@mail> test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.daily )

/etc/cron.daily/spamassassin:
command 're2c -i -b -o scanner1.c scanner1.re' failed: exit 2
___________

Subject: Logwatch for mail (Linux)

################### Logwatch 7.4.0 (05/29/13) ####################
        Processing Initiated: Fri Feb 13 06:25:08 2015
        Date Range Processed: yesterday
                              ( 2015-Feb-12 )
                              Period is day.
        Detail Level of Output: 0
        Type of Output/Format: mail / text
        Logfiles for Host: mail
##################################################################

--------------------- Amavisd-new Begin ------------------------

       24   *Warning: Virus scanner connection failure
       31   Miscellaneous warnings 

        6   Total messages scanned ------------------  100.00%
   65.539K  Total bytes scanned                         67,112
========   ==================================================

        6   Passed ----------------------------------  100.00%
        6     Unchecked passed                         100.00%
========   ==================================================

        6   Unchecked -------------------------------  100.00%
        6     Unchecked passed                         100.00%
========   ==================================================

**Unmatched Entries**
        1   Deleting db files snmp.db,__db.001,__db.003,nanny.db,__db.002 in /var/lib/amavis/db

---------------------- Amavisd-new End -------------------------

--------------------- barracuda spam firewall Begin ------------------------

**Unmatched Entries**

Feb 12 02:01:12 mail amavis[28719]: (28719-03) (!)run_av (ClamAV-clamscan) FAILED - unexpected exit 2, output="WARNING: Ignoring deprecated option --disable-summary\nLibClamAV Error: mpool_malloc(): Can't allocate memory (512000 bytes).\nLibClamAV Error: hm_addhash_bin: failed to grow hash array to 16384 entries\nLibClamAV Error: cli_loadhash: Malformed hash string at line 433905\nLibClamAV Error: cli_loadhash: Problem parsing database at line 433905\nLibClamAV Error: Can't load main.mdb: Can't allocate memory\nLibClamAV Error: cli_tgzload: Can't load main.mdb\nLibClamAV Error: Can't load /var/lib/clamav/main.cvd: Malformed database\nLibClamAV Error: cli_loaddbdir(): error loading database /var/lib/clamav/main.cvd\nERROR: Malformed database\n\n----------- SCAN SUMMARY -----------\nKnown viruses: 1396245\nEngine version: 0.98.5\nScanned directories: 0\nScanned files: 0\nInfected files: 0\nData scanned: 0.00 MB\nData read: 0.00 MB (ratio 0.00:1)\nTime: 2.642 sec (0 m 2 s)"
Feb 12 02:01:12 mail amavis[28719]: (28719-03) (!)ClamAV-clamscan av-scanner FAILED: /usr/bin/clamscan unexpected exit 2, output="WARNING: Ignoring deprecated option --disable-summary\nLibClamAV Error: mpool_malloc(): Can't allocate memory (512000 bytes).\nLibClamAV Error: hm_addhash_bin: failed to grow hash array to 16384 entries\nLibClamAV Error: cli_loadhash: Malformed hash string at line 433905\nLibClamAV Error: cli_loadhash: Problem parsing database at line 433905\nLibClamAV Error: Can't load main.mdb: Can't allocate memory\nLibClamAV Error: cli_tgzload: Can't load main.mdb\nLibClamAV Error: Can't load /var/lib/clamav/main.cvd: Malformed database\nLibClamAV Error: cli_loaddbdir(): error loading database /var/lib/clamav/main.cvd\nERROR: Malformed database\n\n----------- SCAN SUMMARY -----------\nKnown viruses: 1396245\nEngine version: 0.98.5\nScanned directories: 0\nScanned files: 0\nInfected files: 0\nData scanned: 0.00 MB\nData read: 0.00 MB (ratio 0.00:1)\nTime: 2.642 sec (0
m 2 s)" at (eval...
Feb 12 03:30:11 mail amavis[28720]: (28720-03) (!)run_av (ClamAV-clamscan) FAILED - unexpected exit 2, output="WARNING: Ignoring deprecated option --disable-summary\nLibClamAV Error: mpool_malloc(): Can't allocate memory (262144 bytes).\nLibClamAV Error: hm_addhash_bin: failed to grow hash array to 4097 entries\nLibClamAV Error: cli_loadhash: Malformed hash string at line 260235\nLibClamAV Error: cli_loadhash: Problem parsing database at line 260235\nLibClamAV Error: Can't load main.mdb: Can't allocate memory\nLibClamAV Error: cli_tgzload: Can't load main.mdb\nLibClamAV Error: Can't load /var/lib/clamav/main.cvd: Malformed database\nLibClamAV Error: cli_loaddbdir(): error loading database /var/lib/clamav/main.cvd\nERROR: Malformed database\n\n----------- SCAN SUMMARY -----------\nKnown viruses: 1396245\nEngine version: 0.98.5\nScanned directories: 0\nScanned files: 0\nInfected files: 0\nData scanned: 0.00 MB\nData read: 0.00 MB (ratio 0.00:1)\nTime: 2.316 sec (0 m 2 s)"
Feb 12 03:30:11 mail amavis[28720]: (28720-03) (!)ClamAV-clamscan av-scanner FAILED: /usr/bin/clamscan unexpected exit 2, output="WARNING: Ignoring deprecated option --disable-summary\nLibClamAV Error: mpool_malloc(): Can't allocate memory (262144 bytes).\nLibClamAV Error: hm_addhash_bin: failed to grow hash array to 4097 entries\nLibClamAV Error: cli_loadhash: Malformed hash string at line 260235\nLibClamAV Error: cli_loadhash: Problem parsing database at line 260235\nLibClamAV Error: Can't load main.mdb: Can't allocate memory\nLibClamAV Error: cli_tgzload: Can't load main.mdb\nLibClamAV Error: Can't load /var/lib/clamav/main.cvd: Malformed database\nLibClamAV Error: cli_loaddbdir(): error loading database /var/lib/clamav/main.cvd\nERROR: Malformed database\n\n----------- SCAN SUMMARY -----------\nKnown viruses: 1396245\nEngine version: 0.98.5\nScanned directories: 0\nScanned files: 0\nInfected files: 0\nData scanned: 0.00 MB\nData read: 0.00 MB (ratio 0.00:1)\nTime: 2.316 sec (0 m
  2 s)" at (eval ...
Feb 12 06:25:21 mail amavis[28721]: (28721-03) (!)run_av (ClamAV-clamscan) FAILED - unexpected exit 2, output="WARNING: Ignoring deprecated option --disable-summary\nLibClamAV Error: mpool_malloc(): Can't allocate memory (262144 bytes).\nLibClamAV Error: hm_addhash_bin: failed to grow hash array to 1 entries\nLibClamAV Error: cli_loadhash: Malformed hash string at line 239091\nLibClamAV Error: cli_loadhash: Problem parsing database at line 239091\nLibClamAV Error: Can't load main.mdb: Can't allocate memory\nLibClamAV Error: cli_tgzload: Can't load main.mdb\nLibClamAV Error: Can't load /var/lib/clamav/main.cvd: Malformed database\nLibClamAV Error: cli_loaddbdir(): error loading database /var/lib/clamav/main.cvd\nERROR: Malformed database\n\n----------- SCAN SUMMARY -----------\nKnown viruses: 1396245\nEngine version: 0.98.5\nScanned directories: 0\nScanned files: 0\nInfected files: 0\nData scanned: 0.00 MB\nData read: 0.00 MB (ratio 0.00:1)\nTime: 2.475 sec (0 m 2 s)"
Feb 12 06:25:21 mail amavis[28721]: (28721-03) (!)ClamAV-clamscan av-scanner FAILED: /usr/bin/clamscan unexpected exit 2, output="WARNING: Ignoring deprecated option --disable-summary\nLibClamAV Error: mpool_malloc(): Can't allocate memory (262144 bytes).\nLibClamAV Error: hm_addhash_bin: failed to grow hash array to 1 entries\nLibClamAV Error: cli_loadhash: Malformed hash string at line 239091\nLibClamAV Error: cli_loadhash: Problem parsing database at line 239091\nLibClamAV Error: Can't load main.mdb: Can't allocate memory\nLibClamAV Error: cli_tgzload: Can't load main.mdb\nLibClamAV Error: Can't load /var/lib/clamav/main.cvd: Malformed database\nLibClamAV Error: cli_loaddbdir(): error loading database /var/lib/clamav/main.cvd\nERROR: Malformed database\n\n----------- SCAN SUMMARY -----------\nKnown viruses: 1396245\nEngine version: 0.98.5\nScanned directories: 0\nScanned files: 0\nInfected files: 0\nData scanned: 0.00 MB\nData read: 0.00 MB (ratio 0.00:1)\nTime: 2.475 sec (0 m 2
s)" at (eval 140...
Feb 12 20:33:41 mail amavis[12863]: (12863-01) (!)run_av (ClamAV-clamscan) FAILED - unexpected exit 2, output="WARNING: Ignoring deprecated option --disable-summary\nLibClamAV Error: mpool_malloc(): Can't allocate memory (262144 bytes).\nLibClamAV Error: cli_mpool_strdup(): Can't allocate memory (21 bytes).\nLibClamAV Error: cli_loadhash: Problem parsing database at line 802687\nLibClamAV Error: Can't load main.mdb: Malformed database\nLibClamAV Error: cli_tgzload: Can't load main.mdb\nLibClamAV Error: Can't load /var/lib/clamav/main.cvd: Malformed database\nLibClamAV Error: cli_loaddbdir(): error loading database /var/lib/clamav/main.cvd\nERROR: Malformed database\n\n----------- SCAN SUMMARY -----------\nKnown viruses: 1396841\nEngine version: 0.98.5\nScanned directories: 0\nScanned files: 0\nInfected files: 0\nData scanned: 0.00 MB\nData read: 0.00 MB (ratio 0.00:1)\nTime: 4.265 sec (0 m 4 s)"
Feb 12 20:33:41 mail amavis[12863]: (12863-01) (!)ClamAV-clamscan av-scanner FAILED: /usr/bin/clamscan unexpected exit 2, output="WARNING: Ignoring deprecated option --disable-summary\nLibClamAV Error: mpool_malloc(): Can't allocate memory (262144 bytes).\nLibClamAV Error: cli_mpool_strdup(): Can't allocate memory (21 bytes).\nLibClamAV Error: cli_loadhash: Problem parsing database at line 802687\nLibClamAV Error: Can't load main.mdb: Malformed database\nLibClamAV Error: cli_tgzload: Can't load main.mdb\nLibClamAV Error: Can't load /var/lib/clamav/main.cvd: Malformed database\nLibClamAV Error: cli_loaddbdir(): error loading database /var/lib/clamav/main.cvd\nERROR: Malformed database\n\n----------- SCAN SUMMARY -----------\nKnown viruses: 1396841\nEngine version: 0.98.5\nScanned directories: 0\nScanned files: 0\nInfected files: 0\nData scanned: 0.00 MB\nData read: 0.00 MB (ratio 0.00:1)\nTime: 4.265 sec (0 m 4 s)" at (eval 140) line 899.
Feb 12 21:03:57 mail amavis[12860]: (12860-01) (!)run_av (ClamAV-clamscan) FAILED - unexpected exit 2, output="WARNING: Ignoring deprecated option --disable-summary\nLibClamAV Error: mpool_malloc(): Can't allocate memory (262144 bytes).\nLibClamAV Error: hm_addhash_bin: failed to grow hash array to 4098 entries\nLibClamAV Error: cli_loadhash: Malformed hash string at line 259239\nLibClamAV Error: cli_loadhash: Problem parsing database at line 259239\nLibClamAV Error: Can't load main.mdb: Can't allocate memory\nLibClamAV Error: cli_tgzload: Can't load main.mdb\nLibClamAV Error: Can't load /var/lib/clamav/main.cvd: Malformed database\nLibClamAV Error: cli_loaddbdir(): error loading database /var/lib/clamav/main.cvd\nERROR: Malformed database\n\n----------- SCAN SUMMARY -----------\nKnown viruses: 1396841\nEngine version: 0.98.5\nScanned directories: 0\nScanned files: 0\nInfected files: 0\nData scanned: 0.00 MB\nData read: 0.00 MB (ratio 0.00:1)\nTime: 2.474 sec (0 m 2 s)"
Feb 12 21:03:57 mail amavis[12860]: (12860-01) (!)ClamAV-clamscan av-scanner FAILED: /usr/bin/clamscan unexpected exit 2, output="WARNING: Ignoring deprecated option --disable-summary\nLibClamAV Error: mpool_malloc(): Can't allocate memory (262144 bytes).\nLibClamAV Error: hm_addhash_bin: failed to grow hash array to 4098 entries\nLibClamAV Error: cli_loadhash: Malformed hash string at line 259239\nLibClamAV Error: cli_loadhash: Problem parsing database at line 259239\nLibClamAV Error: Can't load main.mdb: Can't allocate memory\nLibClamAV Error: cli_tgzload: Can't load main.mdb\nLibClamAV Error: Can't load /var/lib/clamav/main.cvd: Malformed database\nLibClamAV Error: cli_loaddbdir(): error loading database /var/lib/clamav/main.cvd\nERROR: Malformed database\n\n----------- SCAN SUMMARY -----------\nKnown viruses: 1396841\nEngine version: 0.98.5\nScanned directories: 0\nScanned files: 0\nInfected files: 0\nData scanned: 0.00 MB\nData read: 0.00 MB (ratio 0.00:1)\nTime: 2.474 sec (0 m
  2 s)" at (eval ...

---------------------- barracuda spam firewall End -------------------------

--------------------- clam-update Begin ------------------------

Last ClamAV update process started at Thu Feb 12 23:34:05 2015

Last Status:
    WARNING: Your ClamAV installation is OUTDATED!
    WARNING: Local version: 0.98.5 Recommended version: 0.98.6
    DON'T PANIC! Read http://www.clamav.net/support/faq
    main.cvd is up to date (version: 55, sigs: 2424225, f-level: 60, builder: neo)
    Downloading daily-20062.cdiff [100%]
    daily.cld updated (version: 20062, sigs: 1324264, f-level: 63, builder: jesler)
    bytecode.cld is up to date (version: 246, sigs: 42, f-level: 63, builder: neo)
    Database updated (3748531 signatures) from db.local.clamav.net (IP: 213.174.32.130)

---------------------- clam-update End -------------------------

--------------------- httpd Begin ------------------------

Connection attempts using mod_proxy:
    1.164.46.10 -> mx0.mail2000.com.tw:25: 1 Time(s)
    1.169.88.208 -> mx0.mail2000.com.tw:25: 1 Time(s)

Requests with error response codes
    400 Bad Request
       /w00tw00t.at.ISC.SANS.DFind:): 3 Time(s)
    404 Not Found
       /favicon.ico: 2 Time(s)
       /mysql: 2 Time(s)
       /sql: 2 Time(s)
       /MySQLDumper: 1 Time(s)
       /SQLite/SQLiteManager-1.2.4/main.php: 1 Time(s)
       /SQLiteManager-1.2.4/main.php: 1 Time(s)
       /SQLiteManager/main.php: 1 Time(s)
       /SQlite/main.php: 1 Time(s)
       /jenkins/script: 1 Time(s)
       /jmx-console: 1 Time(s)
       /login: 1 Time(s)
       /manager/html: 1 Time(s)
       /msd: 1 Time(s)
       /msd1.24.4: 1 Time(s)
       /msd1.24stable: 1 Time(s)
       /mySqlDumper: 1 Time(s)
       /myadmin: 1 Time(s)
       /mysqldumper: 1 Time(s)
       /phpMyAdmin: 1 Time(s)
       /phpMyAdmin-4.2.1-all-languages: 1 Time(s)
       /phpMyAdmin-4.2.1-english: 1 Time(s)
       /phpmyadmin: 1 Time(s)
       /script: 1 Time(s)
       /sqlite/main.php: 1 Time(s)
       /sqlitemanager/main.php: 1 Time(s)
       /vtigercrm/: 1 Time(s)
    405 Method Not Allowed
       mx0.mail2000.com.tw:25: 2 Time(s)
    503 Service Unavailable
       /: 3 Time(s)

---------------------- httpd End -------------------------

--------------------- pam_unix Begin ------------------------

su:
    Sessions Opened:
       root -> debian-spamd: 3 Time(s)

---------------------- pam_unix End -------------------------

--------------------- Postfix Begin ------------------------

  135.123K  Bytes accepted                             138,366
   80.339K  Bytes sent via SMTP                         82,267
   62.960K  Bytes delivered                             64,471
   39.791K  Bytes forwarded                             40,746
========   ==================================================

       12   Accepted                                   100.00%
--------   --------------------------------------------------
       12   Total                                      100.00%
========   ==================================================

       11   Connections             
        2   Connections lost (inbound)
       11   Disconnections         
       17   Removed from queue     
        7   Delivered               
        7   Sent via SMTP           
        3   Forwarded               
        2   Notifications sent     

        2   SASL authenticated messages

---------------------- Postfix End -------------------------

--------------------- SSHD Begin ------------------------

Users logging in through sshd:
    antonio:
       31.43.102.240 (unallocated.sta.lan.ua): 1 time

---------------------- SSHD End -------------------------

--------------------- Disk Space Begin ------------------------

Filesystem      Size  Used Avail Use% Mounted on
/dev/vda2        24G  2.5G   21G  11% /
udev            486M  4.0K  486M   1% /dev
/dev/vda1       488M   67M  396M  15% /boot

---------------------- Disk Space End -------------------------

###################### Logwatch End #########################

___________

Subject: Cron <amavis@mail> test -e /usr/sbin/amavisd-new-cronjob && /usr/sbin/amavisd-new-cronjob sa-sync

rules: failed to run T_SPF_HELO_TEMPERROR test, skipping:
    (Can't locate object method "check_for_spf_helo_temperror" via package "Mail::SpamAssassin::PerMsgStatus" at (eval 1183) line 123.
)
rules: failed to run T_SPF_PERMERROR test, skipping:
    (Can't locate object method "check_for_spf_permerror" via package "Mail::SpamAssassin::PerMsgStatus" at (eval 1183) line 1782.
)
rules: failed to run T_SPF_TEMPERROR test, skipping:
    (Can't locate object method "check_for_spf_temperror" via package "Mail::SpamAssassin::PerMsgStatus" at (eval 1183) line 1881.
)
rules: failed to run T_SPF_HELO_PERMERROR test, skipping:
    (Can't locate object method "check_for_spf_helo_permerror" via package "Mail::SpamAssassin::PerMsgStatus" at (eval 1183) line 1980.
)
___________

Sorry that the post is so long.
What to check, what to look?
Please help.

Thanks in advance!!!

Best Regards,
Anton.