sent mails are not recieved

[luggie]

Hi!
I installed & configured roundcube on my server running Ubuntu 14.04.
When I send an eMail, "sent succesfully" pops uü but I dont recieve it with my other mail-account, not hosted on that server.
mail.log:

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Mar 15 11:36:42 Ubuntu-1404-trusty-64-minimal dovecot: imap-login: Login: user=<[email protected]>, method=PLAIN, rip=136.243.54.13, lip=136.243.54.13, mpid=9595, secured, session=<kQcf+RMu1QCI8zYN>
Mar 15 11:36:42 Ubuntu-1404-trusty-64-minimal dovecot: imap([email protected]): Disconnected: Logged out in=32 out=449
Mar 15 11:36:42 Ubuntu-1404-trusty-64-minimal dovecot: imap-login: Login: user=<[email protected]>, method=PLAIN, rip=136.243.54.13, lip=136.243.54.13, mpid=9597, secured, session=<DRAk+RMu1wCI8zYN>
Mar 15 11:36:42 Ubuntu-1404-trusty-64-minimal dovecot: imap([email protected]): Disconnected: Logged out in=44 out=573
Mar 15 11:36:50 Ubuntu-1404-trusty-64-minimal postfix/pickup[9590]: F020E46097C: uid=33 from=<[email protected]>
Mar 15 11:36:50 Ubuntu-1404-trusty-64-minimal postfix/cleanup[9601]: F020E46097C: message-id=<[email protected]>
Mar 15 11:36:51 Ubuntu-1404-trusty-64-minimal dovecot: imap-login: Login: user=<[email protected]>, method=PLAIN, rip=136.243.54.13, lip=136.243.54.13, mpid=9605, secured, session=<e5Si+RMu2ACI8zYN>
Mar 15 11:36:51 Ubuntu-1404-trusty-64-minimal postfix/qmgr[9591]: F020E46097C: from=<[email protected]>, size=560, nrcpt=1 (queue active)
Mar 15 11:36:51 Ubuntu-1404-trusty-64-minimal postfix/smtp[9607]: F020E46097C: to=<[email protected]>, relay=mx00.emig.gmx.net[212.227.15.9]:25, delay=0.17, delays=0.1/0.01/0.05/0, dsn=5.0.0, status=bounced (host mx00.emig.gmx.net[212.227.15.9] refused to talk to me: 550-Requested action not taken: mailbox unavailable 550-Reject due to policy restrictions. 550 For explanation visit http://postmaster.gmx.com/en/error-messages?ip=136.243.54.13&c=poli)
Mar 15 11:36:51 Ubuntu-1404-trusty-64-minimal postfix/cleanup[9601]: 2DE5B46097A: message-id=<20160315103651.2DE5B46097A@Ubuntu-1404-trusty-64-minimal.localdomain>
Mar 15 11:36:51 Ubuntu-1404-trusty-64-minimal dovecot: imap([email protected]): Disconnected: Logged out in=466 out=568
Mar 15 11:36:51 Ubuntu-1404-trusty-64-minimal postfix/bounce[9608]: F020E46097C: sender non-delivery notification: 2DE5B46097A
Mar 15 11:36:51 Ubuntu-1404-trusty-64-minimal postfix/qmgr[9591]: 2DE5B46097A: from=<>, size=2992, nrcpt=1 (queue active)
Mar 15 11:36:51 Ubuntu-1404-trusty-64-minimal postfix/qmgr[9591]: F020E46097C: removed
Mar 15 11:36:51 Ubuntu-1404-trusty-64-minimal dovecot: lmtp(9610): Connect from local
Mar 15 11:36:51 Ubuntu-1404-trusty-64-minimal dovecot: lmtp(9610, [email protected]): mLjfD8Pl51aKJQAA4rfF6Q: msgid=<20160315103651.2DE5B46097A@Ubuntu-1404-trusty-64-minimal.localdomain>: saved mail to INBOX
Mar 15 11:36:51 Ubuntu-1404-trusty-64-minimal postfix/lmtp[9609]: 2DE5B46097A: to=<[email protected]>, relay=Ubuntu-1404-trusty-64-minimal.localdomain[private/dovecot-lmtp], delay=0.17, delays=0.06/0.01/0.01/0.09, dsn=2.0.0, status=sent (250 2.0.0 <[email protected]> mLjfD8Pl51aKJQAA4rfF6Q Saved)
Mar 15 11:36:51 Ubuntu-1404-trusty-64-minimal dovecot: lmtp(9610): Disconnect from local: Successful quit
Mar 15 11:36:51 Ubuntu-1404-trusty-64-minimal postfix/qmgr[9591]: 2DE5B46097A: removed
Mar 15 11:36:51 Ubuntu-1404-trusty-64-minimal dovecot: imap-login: Login: user=<[email protected]>, method=PLAIN, rip=136.243.54.13, lip=136.243.54.13, mpid=9613, secured, session=<zAGw+RMu3gCI8zYN>
Mar 15 11:36:52 Ubuntu-1404-trusty-64-minimal dovecot: imap([email protected]): Disconnected: Logged out in=44 out=573
Mar 15 11:36:52 Ubuntu-1404-trusty-64-minimal dovecot: imap-login: Login: user=<[email protected]>, method=PLAIN, rip=136.243.54.13, lip=136.243.54.13, mpid=9617, secured, session=<iem5+RMu3wCI8zYN>
Mar 15 11:36:52 Ubuntu-1404-trusty-64-minimal dovecot: imap-login: Login: user=<[email protected]>, method=PLAIN, rip=136.243.54.13, lip=136.243.54.13, mpid=9619, secured, session=<JxK6+RMu4ACI8zYN>
Mar 15 11:36:52 Ubuntu-1404-trusty-64-minimal dovecot: imap([email protected]): Disconnected: Logged out in=119 out=704
Mar 15 11:36:52 Ubuntu-1404-trusty-64-minimal dovecot: imap([email protected]): Disconnected: Logged out in=304 out=3701

status=bounced (host ... refused to talk to me: 550-Requested action not taken: mailbox unavailable 550-Reject due to policy restrictions.
Means that:
1) Mail address is uknown to host/misspelled which isn't the case (as I'm replying to a mail I recieved) or:
2) Policies of the host are not respected. Any Ideas what exactly could be meant by that?

[ychaouche]

The postfix logs show that your message was sent. Can you send an e-mail without roundcube ? that would help identify if your problem is with roundcube or elsewhere. Try sending one with classic mail client (outlook, evolution, claws-mail, kmail, thunderbird...)

[luggie]

Same problem when sending with Thunderbird

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Mar 15 18:02:01 Ubuntu-1404-trusty-64-minimal postfix/smtp[12838]: EE5AA460982: to=<[email protected]>, relay=mx01.emig.gmx.net[212.227.17.5]:25, delay=0.16, delays=0.09/0.01/0.07/0, dsn=5.0.0, status=bounced (host mx01.emig.gmx.net[212.227.17.5] refused to talk to me: 550-Requested action not taken: mailbox unavailable 550-Reject due to policy restrictions. 550 For explanation visit http://postmaster.gmx.com/en/error-messages?ip=136.243.54.13&c=poli)
Mar 15 18:02:01 Ubuntu-1404-trusty-64-minimal postfix/cleanup[12836]: 285BE460984: message-id=<20160315170201.285BE460984@Ubuntu-1404-trusty-64-minimal.localdomain>
Mar 15 18:02:01 Ubuntu-1404-trusty-64-minimal postfix/bounce[12839]: EE5AA460982: sender non-delivery notification: 285BE460984
Mar 15 18:02:01 Ubuntu-1404-trusty-64-minimal postfix/qmgr[9591]: 285BE460984: from=<>, size=3090, nrcpt=1 (queue active)
Mar 15 18:02:01 Ubuntu-1404-trusty-64-minimal postfix/qmgr[9591]: EE5AA460982: removed
Mar 15 18:02:01 Ubuntu-1404-trusty-64-minimal dovecot: lmtp(12841): Connect from local
Mar 15 18:02:01 Ubuntu-1404-trusty-64-minimal dovecot: lmtp(12841, [email protected]): WKveDAlA6FYpMgAA4rfF6Q: msgid=<20160315170201.285BE460984@Ubuntu-1404-trusty-64-minimal.localdomain>: saved mail to INBOX
Mar 15 18:02:01 Ubuntu-1404-trusty-64-minimal postfix/lmtp[12840]: 285BE460984: to=<[email protected]>, relay=Ubuntu-1404-trusty-64-minimal.localdomain[private/dovecot-lmtp], delay=0.15, delays=0.04/0.01/0.01/0.1, dsn=2.0.0, status=sent (250 2.0.0 <[email protected]> WKveDAlA6FYpMgAA4rfF6Q Saved)
Mar 15 18:02:01 Ubuntu-1404-trusty-64-minimal dovecot: lmtp(12841): Disconnect from local: Successful quit
Mar 15 18:02:01 Ubuntu-1404-trusty-64-minimal postfix/qmgr[9591]: 285BE460984: removed
Mar 15 18:02:05 Ubuntu-1404-trusty-64-minimal postfix/submission/smtpd[12831]: auto_clnt_close: disconnect private/tlsmgr stream
Mar 15 18:02:05 Ubuntu-1404-trusty-64-minimal postfix/submission/smtpd[12831]: rewrite stream disconnect

+I can send mails within my network from mail accounts within my domain without problems.

[ychaouche]

If you have the same problem with thunderbird then the problem isn't with roundcube, it could either be in postfix or with dovecot. You'll get more help on their forums.

Good luck !