Danke vmk für Deinen Hinweis.
In den Logs habe ich folgendes gefunden:
ZitatAlles anzeigenApr 1 01:25:44 v213880518 postfix/smtpd[31476]: warning: 212.40.172.71: address not listed for hostname berner-insolvenzverwaltung.de
Apr 1 01:25:44 v213880518 postfix/smtpd[31476]: connect from unknown[212.40.172.71]
Apr 1 01:25:44 v213880518 postfix/smtpd[31476]: BC0406E0310D: client=unknown[212.40.172.71], sasl_method=LOGIN, sasl_username=test@memorydepot.eu
Apr 1 01:25:44 v213880518 postfix/cleanup[2715]: BC0406E0310D: message-id=<>
Apr 1 01:25:45 v213880518 dkim-filter[16330]: BC0406E0310D: no signature data
Apr 1 01:25:45 v213880518 postfix/qmgr[16772]: BC0406E0310D: from=<secure@barclays.co.uk>, size=485, nrcpt=1 (queue active)
Apr 1 01:25:45 v213880518 postfix/smtpd[31476]: disconnect from unknown[212.40.172.71]
ZitatAlles anzeigenApr 1 05:13:12 v213880518 postfix/smtpd[27572]: 93E926E0460C: client=unknown[212.40.172.71], sasl_method=LOGIN, sasl_username=test@memorydepot.eu
Apr 1 05:13:12 v213880518 postfix/smtp[19026]: F33D26E04609: to=<manager@sarunicamp.com>, relay=us2.mx1.mailhostbox.com[208.91.199.205]:25, delay=11, delays=9.5/0.03/1.3/0.58, dsn=5.7.1, status=bounced (host us2.mx1.mailhostbox.com[208.91.199.205] said: 550-5.7.1 Sanesecurity.Phishing.Cur.19437.UNOFFICIAL detected 550 5.7.1 Please see Various SMTP error codes explained | Email Help Center for explanation of the problem. (in reply to end of DATA command))
[...]
Apr 1 05:13:14 v213880518 postfix/smtp[13035]: connect to yifan.net[199.59.243.105]:25: Connection timed out
Apr 1 05:13:14 v213880518 postfix/smtp[6766]: 5849F6E045F1: to=<lucy.dyson@sheffield.ac.uk>, relay=aspmx.l.google.com[173.194.70.27]:25, delay=53, delays=7.7/14/0.04/31, dsn=5.7.1, status=bounced (host aspmx.l.google.com[173.194.70.27] said: 550-5.7.1 [78.47.34.88 1] Our system has detected an unusual rate of 550-5.7.1 unsolicited mail originating from your IP address. To protect our 550-5.7.1 users from spam, mail sent from your IP address has been blocked. 550-5.7.1 Please visit http://www.google.com/mail/help/bulk_mail.html to review 550 5.7.1 our Bulk Email Senders Guidelines. d42si17208801eep.106 - gsmtp (in reply to end of DATA command))
Apr 1 05:13:15 v213880518 postfix/smtp[6769]: 684F16E04538: to=<internet@peapod.co.uk>, relay=none, delay=453, delays=359/42/52/0, dsn=4.4.3, status=deferred (Host or domain name not found. Name service error for name=peapod.co.uk type=MX: Host not found, try again)
Apr 1 05:13:15 v213880518 postfix/smtp[13003]: connect to mail.crcl.co.uk[62.3.203.155]:25: Connection timed out
Apr 1 05:13:15 v213880518 postfix/smtp[7826]: F33D26E04609: to=<manager@the-grand.co.uk>, relay=mail.the-grand.co.uk[81.149.28.223]:25, delay=15, delays=9.5/0.03/0.15/5, dsn=5.1.1, status=bounced (host mail.the-grand.co.uk[81.149.28.223] said: 550 5.1.1 User unknown (in reply to RCPT TO command))
Apr 1 05:13:15 v213880518 postfix/smtp[19047]: 744056E045FB: to=<machoclub@misfit.co.uk>, relay=MX.MAILANYONE.NET[72.35.23.4]:25, delay=34, delays=7.8/0.03/5.4/21, dsn=5.0.0, status=bounced (host MX.MAILANYONE.NET[72.35.23.4] said: 550 invalid mailbox (call fwd) (in reply to RCPT TO command))
Apr 1 05:13:15 v213880518 postfix/smtp[20329]: F33D26E04609: to=<manager@peninsula.starway.net.au>, relay=vscan.hotkey.net.au[202.138.0.45]:25, delay=15, delays=9.5/0.02/2.3/3.1, dsn=2.0.0, status=sent (250 2.0.0 Ok: queued as 855CE240F3)
Apr 1 05:13:15 v213880518 postfix/smtp[6770]: F33D26E04609: host mx.els.ticketmaster.com[205.132.175.204] refused to talk to me: 554-mx.els.ticketmaster.com 554 Your access to send to this mail system has been rejected due to information we received regarding your sending mail transfer agent. If you believe that this failure is in error, please contact the intended recipient via alternate means.
Apr 1 05:13:15 v213880518 postfix/smtp[30318]: F33D26E04609: to=<manager@littleastongolf.co.uk>, relay=mail1.littleastongolf.co.uk[81.187.132.194]:25, delay=15, delays=9.5/0.02/0.22/5.3, dsn=5.7.1, status=bounced (host mail1.littleastongolf.co.uk[81.187.132.194] said: 550 5.7.1 Message rejected as spam by Content Filtering. (in reply to end of DATA command))
Apr 1 05:13:16 v213880518 postfix/smtp[6765]: F33D26E04609: to=<manager@pinetree-centre.co.uk>, relay=remote.pinetree-centre.co.uk[213.131.105.221]:25, delay=15, delays=9.5/0.02/0.46/5.3, dsn=5.7.1, status=bounced (host remote.pinetree-centre.co.uk[213.131.105.221] said: 550 5.7.1 Message rejected as spam by Content Filtering. (in reply to end of DATA command))
Apr 1 05:13:16 v213880518 postfix/smtpd[21330]: warning: 72.32.122.229: address not listed for hostname azrotech.com
Apr 1 05:13:16 v213880518 postfix/smtpd[21330]: connect from unknown[72.32.122.229]
Apr 1 05:13:16 v213880518 postfix/smtp[13016]: connect to mail3.direct-image.co.uk[82.152.64.78]:25: Connection timed out
Apr 1 05:13:16 v213880518 postfix/smtp[13016]: 40E356E044DD: to=<hanmailkevin@direct-image.co.uk>, relay=none, delay=629, delays=534/35/60/0, dsn=4.4.1, status=deferred (connect to mail3.direct-image.co.uk[82.152.64.78]:25: Connection timed out)
Apr 1 05:13:16 v213880518 postfix/smtp[12969]: B57746E044EA: lost connection with mail1.mxsweep.com[89.167.219.3] while performing the EHLO handshake
Apr 1 05:13:16 v213880518 postfix/smtpd[21330]: NOQUEUE: reject: RCPT from unknown[72.32.122.229]: 450 4.7.1 Client host rejected: cannot find your hostname, [72.32.122.229]; from=<comercial@cristacurva.com> to=<cope@isbnet.com> proto=ESMTP helo=<283583-web2.onikon.com>
Apr 1 05:13:17 v213880518 postfix/smtpd[21330]: disconnect from unknown[72.32.122.229]
[...]
Apr 1 05:13:19 v213880518 postfix/smtp[20120]: 93E926E0460C: to=<margaret.phillp@bakertilly.co.uk>, relay=none, delay=7.2, delays=7.1/0.02/0.07/0, dsn=4.4.1, status=deferred (connect to cluster3.eu.messagelabs.com[194.106.220.35]:25: Connection refused)
Apr 1 05:13:19 v213880518 postfix/smtp[19033]: connect to cluster4.eu.messagelabs.com[193.109.254.147]:25: Connection refused
Apr 1 05:13:19 v213880518 postfix/smtp[30313]: connect to cluster8.eu.messagelabs.com[85.158.140.195]:25: Connection refused
Apr 1 05:13:19 v213880518 postfix/smtp[19040]: F33D26E04609: to=<manager@smail.com>, relay=none, delay=19, delays=9.5/0.03/9.3/0, dsn=4.4.3, status=deferred (Host or domain name not found. Name service error for name=smail.com type=MX: Host not found, try again)
Apr 1 05:13:19 v213880518 postfix/smtp[20329]: 93E926E0460C: to=<margaret.robinson@suht.swest.nhs.uk>, relay=mail.nhs.uk[62.208.144.158]:25, delay=7.3, delays=7.1/0.04/0.08/0, dsn=4.7.1, status=deferred (host mail.nhs.uk[62.208.144.158] refused to talk to me: 450 4.7.1 Service temporarily unavailable; Client host [78.47.34.88] blocked using Trend Micro Email Reputation Service. Please see http://www.mail-abuse.com/cgi-…up?ip_address=78.47.34.88; Mail from 78.47.34.88 deferred using Trend Micro Email Reputation database. Please see <http://www.mail-abuse.com/cgi-bin/lookup?78.47.34.88>)
Apr 1 05:13:19 v213880518 postfix/smtp[19033]: connect to cluster4.eu.messagelabs.com[85.158.139.211]:25: Connection refused
Apr 1 05:13:19 v213880518 postfix/smtp[30313]: connect to cluster8.eu.messagelabs.com[85.158.139.19]:25: Connection refused
Apr 1 05:13:19 v213880518 postfix/smtpd[27572]: disconnect from unknown[212.40.172.71]
Memorydepot.eu gehört mir. Offensichtlich habe ich den Mailserver nicht sicher genug konfiguriert...
Was sollte ich als Nächstes unternehmen?
Danke für Eure Hinweise!