Forgot to mention, that baruwa shows attatched email date and time as: March 10, 2015, 9:42 a.m.

And problem is with multiple users. With ActiveSync and IMAP as well.

Sogo log from same sender:
S[0x7fc171dc3060]: * 3341 FETCH (FLAGS (\Seen) UID 17211 RFC822.SIZE 24800 ENVELOPE ("Tue, 10 Mar 2015 08:42:02 -0700" "=?utf-8?B?S3VpZGFzIG3DvMO8YSB0w6RuYT8=?=" (("=?utf-8?B?TcO8w7xnaW1laXN0ZXI=?=" NIL "etreening" "1business.eu")) (("=?utf-8?B?TcO8w7xnaW1laXN0ZXI=?=" NIL "etreening" "1business.eu")) (("=?utf-8?B?TcO8w7xnaW1laXN0ZXI=?=" NIL "vasta" "1business.eu")) ((NIL NIL "tanel" "torm.ee")) NIL NIL NIL "<56ACE6674B9FBEBD61642D9BDF9732FA@butep>") BODYSTRUCTURE (("TEXT" "PLAIN" ("CHARSET" "utf-8") NIL NIL "QUOTED-PRINTABLE" 2567 62 NIL NIL NIL NIL)("TEXT" "HTML" ("CHARSET" "utf-8") NIL NIL "QUOTED-PRINTABLE" 19973 371 NIL NIL NIL NIL) "ALTERNATIVE" ("BOUNDARY" "----=_NextPart_000_06AE_01D05B0E.14474830") NIL NIL NIL) BODY[HEADER.FIELDS (X-PRIORITY)] {17}

What is your timezone in sogo.conf and in users' preference?

In sogo conf I don't see timezone variable. In user preferences it is europe/tallinn

more /etc/sogo/sogo.conf

{
/* ***** Main SOGo configuration file **

• *
• Since the content of this file is a dictionary in OpenStep plist format, *
• the curly braces enclosing the body of the configuration are mandatory. *
• See the Installation Guide for details on the format. *
• *
• C and C++ style comments are supported. *
• *
• This example configuration contains only a subset of all available *
• configuration parameters. Please see the installation guide more details. *
• *
• ~sogo/GNUstep/Defaults/.GNUstepDefaults has precedence over this file, *
• make sure to move it away to avoid unwanted parameter overrides. *
• *

• **/

  / Database configuration (mysql:// or postgresql://) /
  //SOGoProfileURL = "postgresql://sogo:sogo@localhost:5432/sogo/sogo_user_profile";
  //OCSFolderInfoURL = "postgresql://sogo:sogo@localhost:5432/sogo/sogo_folder_info";
  //OCSSessionsFolderURL = "postgresql://sogo:sogo@localhost:5432/sogo/sogo_sessions_folder";

  / Mail /
  //SOGoDraftsFolderName = Drafts;
  //SOGoSentFolderName = Sent;
  //SOGoTrashFolderName = Trash;
  //SOGoIMAPServer = localhost;
  //SOGoSieveServer = sieve://127.0.0.1:4190;
  //SOGoSMTPServer = 127.0.0.1;
  //SOGoMailDomain = acme.com;
  //SOGoMailingMechanism = smtp;
  //SOGoForceExternalLoginWithEmail = NO;
  //SOGoMailSpoolPath = /var/spool/sogo;
  //NGImap4ConnectionStringSeparator = "/";

  / Notifications /
  //SOGoAppointmentSendEMailNotifications = NO;
  //SOGoACLsSendEMailNotifications = NO;
  //SOGoFoldersSendEMailNotifications = NO;

  / Authentication /
  //SOGoPasswordChangeEnabled = YES;

  / LDAP authentication example /
  //SOGoUserSources = (
  // {
  // type = ldap;
  // CNFieldName = cn;
  // UIDFieldName = uid;
  // IDFieldName = uid; // first field of the DN for direct binds
  // bindFields = (uid, mail); // array of fields to use for indirect binds
  // baseDN = "ou=users,dc=acme,dc=com";
  // bindDN = "uid=sogo,ou=users,dc=acme,dc=com";
  // bindPassword = qwerty;
  // canAuthenticate = YES;
  // displayName = "Shared Addresses";
  // hostname = ldap://127.0.0.1:389;
  // id = public;
  // isAddressBook = YES;
  // }
  //);

  / LDAP AD/Samba4 example /
  //SOGoUserSources = (
  // {
  // type = ldap;
  // CNFieldName = cn;
  // UIDFieldName = sAMAccountName;
  // baseDN = "CN=users,dc=domain,dc=tld";
  // bindDN = "CN=sogo,CN=users,DC=domain,DC=tld";
  // bindFields = (sAMAccountName, mail);
  // bindPassword = password;
  // canAuthenticate = YES;
  // displayName = "Public";
  // hostname = ldap://127.0.0.1:389;
  // filter = "mail = '*'";
  // id = directory;
  // isAddressBook = YES;
  // }
  //);

  / SQL authentication example /
  /* These database columns MUST be present in the view/table:

• c_uid - will be used for authentication - it's the username or username@domain.tld)
• c_name - which can be identical to c_uid - will be used to uniquely identify entries
• c_password - password of the user, plain-text, md5 or sha encoded for now
• c_cn - the user's common name - such as "John Doe"
• mail - the user's mail address

• See the installation guide for more details
  */
  //SOGoUserSources =
  // (
  // {
  // type = sql;
  // id = directory;
  // viewURL = "postgresql://sogo:sogo@127.0.0.1:5432/sogo/sogo_view";
  // canAuthenticate = YES;
  // isAddressBook = YES;
  // userPasswordAlgorithm = md5;
  // }
  // );

  / Web Interface /
  //SOGoPageTitle = SOGo;
  //SOGoVacationEnabled = YES;
  //SOGoForwardEnabled = YES;
  //SOGoSieveScriptsEnabled = YES;
  //SOGoMailAuxiliaryUserAccountsEnabled = YES;
  //SOGoTrustProxyAuthentication = NO;

  / General /
  //SOGoLanguage = English;
  //SOGoTimeZone = America/Montreal;
  //SOGoCalendarDefaultRoles = (
  // PublicDAndTViewer,
  // ConfidentialDAndTViewer
  //);
  //SOGoSuperUsernames = (sogo1, sogo2); // This is an array - keep the parens!
  //SxVMemLimit = 384;
  //WOPidFile = "/var/run/sogo/sogo.pid";
  //SOGoMemcachedHost = "/var/run/memcached.sock";

  / Debug /
  //SOGoDebugRequests = YES;
  //SoDebugBaseURL = YES;
  //ImapDebugEnabled = YES;
  //LDAPDebugEnabled = YES;
  //PGDebugEnabled = YES;
  //MySQL4DebugEnabled = YES;
  //SOGoUIxDebugEnabled = YES;
  //WODontZipResponse = YES;
  //WOLogFile = /var/log/sogo/sogo.log;
  }

What timestamp do you think is wrong? Is it the Sent:-timestamp mentioned in the quoted message?

From: Müügimeister [mailto:etreening@1business.eu]
Sent: Tuesday, March 10, 2015 5:42 PM <<<<<<<<<<<<<<???
To: tanel@torm.ee
Subject: Kuidas müüa täna?

Yes the same. Email was recieved March 10, 2015, 9:42 a.m. but webmail and outlook display recieving time as March 10, 2015 5:42 PM

Client gets this kind on mismatched time letters few times a week

This is more a client (sender) issue (I assume outlook). See following links discussing such issues:
https://uk.answers.yahoo.com/question/index?qid=20100818143717AA6Wegf
http://answers.microsoft.com/en-us/office/forum/officeversion_other-outlook/reply-andor-forward-email-body-having-recipient/68fe30d4-4f89-48f0-a973-0e4d387bc1e8
http://answers.microsoft.com/en-us/office/forum/office_2010-outlook/outlook-is-it-possible-to-have-the-time-zone/b6bafefe-af3a-438e-9713-68a57d9eebda

These topic are about replying and forwarding messages as I can understand.

Not sure what you mean with above statement. You confirmed above that it’s about the timestamp in the quoted message (in the body of the mail) and the topics are about issue when forwarding messages ...

I think that we have misspoken here.

Problem here is.

Client receives an email at 11:00 (europe/Tallinn timezone). But in webmail and in outlook receiving time is shown e.g same date 17:00 (in future).

Sorry if i am causing a confusion, but I want to make sure, that this problem is caused by persons who send those letters.

Screenshot + raw source of the email please.

I try to get raw source within few days. Screenshots are added to the topic.

Is it possible that this is somehow related to spam mail? Beacause all these letters with future date is somesort of advertise emails?

"Sent:" is set by the email client of the sender.
If he sets a wrong date/time, you receive a wrong date/time.
There is nothing SOGo can do about that.

I saw some spammer use that with dates in the future, in order to get it always on top of the email queue.

But SOGo could list emails based on their reception date/time instead of the "Sent:" date/time.

Check also bug 0000708

Suspended for now. Reopen with evidences if necessary.