Hi Dear Forum!
Please help me with the solution of my problem. I have this kind of a mail server:
Release 7.1.4_GA_2555.RHEL5_64_20120105094627 CentOS5_64 FOSS edition, Patch 7.1.4_P1.
I have a problem with spam-filter. When i am trying manually to educate my filter using command line "zmtrainsa" i am getting such kind of messages:

Code:
[zimbra@mail root]$ zmtrainsa
20120322143100 Starting spam/ham extraction from system accounts.
[] WARN: exception occurred fetching message
com.sun.mail.util.DecodingException: BASE64Decoder: Error in encoded stream: needed at least 2 valid base64 characters, but only got 1 before padding character (=), the 10 most recent characters were: "a.ru&code="
        at com.sun.mail.util.BASE64DecoderStream.decode(BASE64DecoderStream.java:262)
        at com.sun.mail.util.BASE64DecoderStream.read(BASE64DecoderStream.java:140)
        at java.io.FilterInputStream.read(FilterInputStream.java:90)
        at javax.activation.DataHandler.writeTo(DataHandler.java:293)
        at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:1383)
        at javax.mail.internet.MimeMessage.writeTo(MimeMessage.java:1743)
        at javax.mail.internet.MimeMessage.writeTo(MimeMessage.java:1719)
        at com.zimbra.cs.util.SpamExtract.writeAttachedMessages(SpamExtract.java:379)
        at com.zimbra.cs.util.SpamExtract.extractMessage0(SpamExtract.java:349)
        at com.zimbra.cs.util.SpamExtract.extractMessage(SpamExtract.java:296)
        at com.zimbra.cs.util.SpamExtract.extract(SpamExtract.java:245)
        at com.zimbra.cs.util.SpamExtract.main(SpamExtract.java:194)
[] WARN: exception occurred fetching message
com.sun.mail.util.DecodingException: BASE64Decoder: Error in encoded stream: found valid base64 character after a padding character (=), the 10 most recent characters were: ") 5O  2= 6"
        at com.sun.mail.util.BASE64DecoderStream.decode(BASE64DecoderStream.java:301)
        at com.sun.mail.util.BASE64DecoderStream.read(BASE64DecoderStream.java:140)
        at java.io.FilterInputStream.read(FilterInputStream.java:90)
        at javax.activation.DataHandler.writeTo(DataHandler.java:293)
        at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:1383)
        at javax.mail.internet.MimeMessage.writeTo(MimeMessage.java:1743)
        at javax.mail.internet.MimeMessage.writeTo(MimeMessage.java:1719)
        at com.zimbra.cs.util.SpamExtract.writeAttachedMessages(SpamExtract.java:379)
        at com.zimbra.cs.util.SpamExtract.extractMessage0(SpamExtract.java:349)
        at com.zimbra.cs.util.SpamExtract.extractMessage(SpamExtract.java:296)
        at com.zimbra.cs.util.SpamExtract.extract(SpamExtract.java:245)
        at com.zimbra.cs.util.SpamExtract.main(SpamExtract.java:194)
[] WARN: exception occurred fetching message
com.sun.mail.util.DecodingException: BASE64Decoder: Error in encoded stream: found valid base64 character after a padding character (=), the 10 most recent characters were: ") 5O  2= 6"
        at com.sun.mail.util.BASE64DecoderStream.decode(BASE64DecoderStream.java:301)
        at com.sun.mail.util.BASE64DecoderStream.read(BASE64DecoderStream.java:140)
        at java.io.FilterInputStream.read(FilterInputStream.java:90)
        at javax.activation.DataHandler.writeTo(DataHandler.java:293)
        at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:1383)
        at javax.mail.internet.MimeMessage.writeTo(MimeMessage.java:1743)
        at javax.mail.internet.MimeMessage.writeTo(MimeMessage.java:1719)
        at com.zimbra.cs.util.SpamExtract.writeAttachedMessages(SpamExtract.java:379)
        at com.zimbra.cs.util.SpamExtract.extractMessage0(SpamExtract.java:349)
        at com.zimbra.cs.util.SpamExtract.extractMessage(SpamExtract.java:296)
        at com.zimbra.cs.util.SpamExtract.extract(SpamExtract.java:245)
        at com.zimbra.cs.util.SpamExtract.main(SpamExtract.java:194)
[] WARN: exception occurred fetching message
com.sun.mail.util.DecodingException: BASE64Decoder: Error in encoded stream: found valid base64 character after a padding character (=), the 10 most recent characters were: ") 5O  2= 6"
        at com.sun.mail.util.BASE64DecoderStream.decode(BASE64DecoderStream.java:301)
        at com.sun.mail.util.BASE64DecoderStream.read(BASE64DecoderStream.java:140)
        at java.io.FilterInputStream.read(FilterInputStream.java:90)
        at javax.activation.DataHandler.writeTo(DataHandler.java:293)
        at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:1383)
        at javax.mail.internet.MimeMessage.writeTo(MimeMessage.java:1743)
        at javax.mail.internet.MimeMessage.writeTo(MimeMessage.java:1719)
        at com.zimbra.cs.util.SpamExtract.writeAttachedMessages(SpamExtract.java:379)
        at com.zimbra.cs.util.SpamExtract.extractMessage0(SpamExtract.java:349)
        at com.zimbra.cs.util.SpamExtract.extractMessage(SpamExtract.java:296)
        at com.zimbra.cs.util.SpamExtract.extract(SpamExtract.java:245)
        at com.zimbra.cs.util.SpamExtract.main(SpamExtract.java:194)
[] INFO: Total messages processed: 48
[] INFO: Total messages processed: 0
20120322143106 Finished extracting spam/ham from system accounts.
20120322143106 Starting spamassassin training.
netset: cannot include 127.0.0.0/8 as it has already been included
Learned tokens from 0 message(s) (46 message(s) examined)
netset: cannot include 127.0.0.0/8 as it has already been included
Learned tokens from 0 message(s) (0 message(s) examined)
netset: cannot include 127.0.0.0/8 as it has already been included
bayes: synced databases from journal in 0 seconds: 420 unique entries (488 total entries)
20120322143112 Finished spamassassin training.
What am i doing wrong?