Eroare server de mail

Salutare.

Am si eu o mica problema cu serverul de mail... pot trimite dar nu pot primi (partial)...

Mi-am instalat si eu serverul de mail (aveam nevoie de virtual users & domains), folosind tutorialul http://www.howtoforge.com/virtual-users-domains-postfix-courier-mysql-squirrelmail-mandriva-2009.1-x86_64 cu mici adaptari pentru 2010.0. difera putin ceva versiuni de pachete la un moment dat (daca aveti nevoie de ele, sa-mi scrieti sa vi le trimit, ca nu le stiu acum pe de rost, dar am notat pe undeva).

ideea e ca pot trimite emailuri, dar nu pot primi, dar asta doar intr-o situatie. daca folosesc domeniul care este setat la server (uifi.ro). deci am facut conform tutorialului adresa

, am trimis mail pe yahoo si a ajuns acolo (in spam, da asta e alta poveste). cand dau reply de pe yahoo, nu mai ajunge la mine in inbox nimic (am incercat si din squirrel sa verific, si din thunderbird). Problema nu e la client din cate mi-am dat seama... aici e ce apare in log la postfix (/var/log/mail/info.log):

Dec 31 12:45:58 uifi postfix/smtp[30487]: B200F2134A6: host a.mx.mail.yahoo.com[67.195.168.31] said: 451 Resources temporarily not available - Please try again later [#4.16.5]. (in reply to end of DATA command)
Dec 31 12:46:04 uifi postfix/smtp[30487]: B200F2134A6: host c.mx.mail.yahoo.com[209.191.88.254] refused to talk to me: 420 Resources unavailable temporarily. Please try later (mta1092.mail.mud.yahoo.com)
Dec 31 12:46:04 uifi postfix/smtp[30487]: B200F2134A6: host c.mx.mail.yahoo.com[206.190.54.127] refused to talk to me: 421 Message from (82.79.151.73) temporarily deferred - 4.16.50. Please refer to http://help.yahoo.com/help/us/mail/defer/defer-06.html
Dec 31 12:46:07 uifi postfix/smtp[30487]: B200F2134A6: to=, relay=b.mx.mail.yahoo.com[74.6.136.65]:25, delay=18, delays=0.04/0/16/1.3, dsn=2.0.0, status=sent (250 ok dirdel)
Dec 31 12:46:07 uifi postfix/qmgr[16475]: B200F2134A6: removed
Dec 31 12:46:48 uifi postfix/smtpd[30494]: connect from web38508.mail.mud.yahoo.com[209.191.125.54]
Dec 31 12:46:49 uifi postfix/smtpd[30494]: 66DC32134A5: client=web38508.mail.mud.yahoo.com[209.191.125.54]
Dec 31 12:46:49 uifi postfix/cleanup[30479]: 66DC32134A5: message-id=
Dec 31 12:46:49 uifi postfix/qmgr[16475]: 66DC32134A5: from=, size=2123, nrcpt=1 (queue active)
Dec 31 12:46:49 uifi amavis[16384]: (16384-02) NOTICE: reconnecting in response to: err=2006, HY000, DBD::mysql::st execute failed: MySQL server has gone away at (eval 100) line 166,  line 5.
Dec 31 12:46:50 uifi postfix/smtpd[30494]: disconnect from web38508.mail.mud.yahoo.com[209.191.125.54]
Dec 31 12:46:59 uifi postfix/smtpd[30507]: connect from uifi.ro[127.0.0.1]
Dec 31 12:46:59 uifi postfix/smtpd[30507]: E555D2134A6: client=uifi.ro[127.0.0.1]
Dec 31 12:46:59 uifi postfix/cleanup[30479]: E555D2134A6: message-id=
Dec 31 12:46:59 uifi postfix/qmgr[16475]: E555D2134A6: from=, size=2736, nrcpt=1 (queue active)
Dec 31 12:46:59 uifi postfix/smtpd[30507]: disconnect from uifi.ro[127.0.0.1]
Dec 31 12:46:59 uifi amavis[16384]: (16384-02) Passed CLEAN, [209.191.125.54] [82.79.151.73]  -> , Message-ID: , mail_id: Hzm7H0VS5bqX, Hits: 0.483, size: 2120, queued_as: E555D2134A6, dkim_id=my_email@yahoo.com, 9971 ms
Dec 31 12:46:59 uifi postfix/smtp[30502]: 66DC32134A5: to=, relay=127.0.0.1[127.0.0.1]:10024, delay=11, delays=0.72/0/0/10, dsn=2.0.0, status=sent (250 2.0.0 Ok, id=16384-02, from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as E555D2134A6)
Dec 31 12:46:59 uifi postfix/qmgr[16475]: 66DC32134A5: removed
Dec 31 12:46:59 uifi postfix/local[30514]: E555D2134A6: to=, orig_to=, relay=local, delay=0.03, delays=0/0.02/0/0.01, dsn=2.0.0, status=sent (delivered to mailbox)
Dec 31 12:46:59 uifi postfix/qmgr[16475]: E555D2134A6: removed

Deci ceva se intampla de ajunge sa fie sters... dar cum nu am experienta, nu-mi dau seama exact ce cauzeaza chestia asta.

Asta ca asta, dar m-am gandit apoi sa incerc sa creez ceva email pentru alt domeniu care este indreptat spre serverul meu... am adaugat domeniul in tabelul de domains (dupa cum zice aici: http://www.howtoforge.com/virtual-users-domains-postfix-courier-mysql-squirrelmail-mandriva-2009.1-x86_64-p4 , la pasul 13), am adaugat apoi emailul, si surpriza ! merge sa si trimit si sa si primesc email... am incercat pt un alt domeniu, la fel... singura diferenta e ca uifi.ro este domeniul serverului, nu este domeniu adaugat in tabelul domains (initial l-am adaugat acolo, dar nu mergea, si in plus primeam in loguri mesaj ca nu trebuie sa am domeniul acolo la domenii virtuale daca e deja domeniul serverului).

Aveti vreo idee cum pot face sa mearga si cu adrese de email @uifi.ro ? La restul de domenii se pare ca merge ok, ceea ce e foarte bine, ca ala era scopul final, dar mi-ar placea sa mearga si pt uifi.ro.

Mersi de idei, salutare