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what does these log lines mean?

I have in mail.log file lines like below:

Nov 5 10:14:31 s1 postfix/smtpd[27320]: NOQUEUE: filter: RCPT from
dedicated-aip61.rev.nazwa.pl[77.55.223.61]: < ... at pomagam dot online>:
Sender address triggers FILTER amavis:[127.0.0.1]:10024;
from=< ... at pomagam dot online> to=< ... at skpkrakow dot pl> proto=ESMTP
helo=<dedicated-aip61.rev.nazwa.pl>
Nov 5 10:14:31 s1 postfix/smtpd[27320]: NOQUEUE: reject: RCPT from
dedicated-aip61.rev.nazwa.pl[77.55.223.61]: 454 4.7.1
< ... at skpkrakow dot pl>: Relay access denied;
from=< ... at pomagam dot online> to=< ... at skpkrakow dot pl> proto=ESMTP
helo=<dedicated-aip61.rev.nazwa.pl>
Nov 5 10:14:31 s1 postfix/smtpd[27320]: disconnect from
dedicated-aip61.rev.nazwa.pl[77.55.223.61] ehlo=2 starttls=1 mail=4
rcpt=0/4 rset=3 quit=1 commands=11/15
Nov 5 10:14:31 s1 postfix/smtpd[27320]: NOQUEUE: filter: RCPT from
dedicated-aip61.rev.nazwa.pl[77.55.223.61]: < ... at pomagam dot online>:
Sender address triggers FILTER amavis:[127.0.0.1]:10026;
from=< ... at pomagam dot online> to=< ... at skpkrakow dot pl> proto=ESMTP
helo=<dedicated-aip61.rev.nazwa.pl>

What do they mean?