Fetchmail

My ISPConfig give me a lot this message. What´s it´s means ?

Jun 29 17:14:43 vmail getmail: msg 2297/2392 (13431 bytes) msgid 1277455575.3972.hm10,S=13431 not retrieved (seen)
Jun 29 17:14:43 vmail getmail: msg 2298/2392 (6494 bytes) msgid 1277456449.18266.hm10,S=6494 not retrieved (seen)
Jun 29 17:14:43 vmail getmail: msg 2299/2392 (60924 bytes) msgid 1277457413.5398.hm10,S=60924 not retrieved (seen)
Jun 29 17:14:43 vmail getmail: msg 2300/2392 (628981 bytes) msgid 1277461901.25894.hm10,S=628981 not retrieved (seen)
Jun 29 17:14:43 vmail getmail: msg 2301/2392 (2057 bytes) msgid 1277462789.26920.hm10,S=2057 not retrieved (seen)
Jun 29 17:14:43 vmail getmail: msg 2302/2392 (174435 bytes) msgid 1277465968.4593.hm10,S=174435 not retrieved (seen)
Jun 29 17:14:43 vmail getmail: msg 2303/2392 (24969 bytes) msgid 1277467152.19282.hm10,S=24969 not retrieved (seen)
Jun 29 17:14:43 vmail getmail: msg 2304/2392 (161847 bytes) msgid 1277467544.10716.hm10,S=161847 not retrieved (seen)
Jun 29 17:14:43 vmail getmail: msg 2305/2392 (25890 bytes) msgid 1277469031.2936.hm10,S=25890 not retrieved (seen)
Jun 29 17:14:43 vmail getmail: msg 2306/2392 (131251 bytes) msgid 1277470288.23416.hm10,S=131251 not retrieved (seen)
Jun 29 17:14:43 vmail getmail: msg 2307/2392 (35854 bytes) msgid 1277470826.21870.hm10,S=35854 not retrieved (seen)
Jun 29 17:14:43 vmail getmail: msg 2308/2392 (25310 bytes) msgid 1277471245.6662.hm10,S=25310 not retrieved (seen)
Jun 29 17:14:43 vmail getmail: msg 2309/2392 (164152 bytes) msgid 1277471590.22027.hm10,S=164152 not retrieved (seen)
Jun 29 17:14:43 vmail getmail: msg 2310/2392 (227871 bytes) msgid 1277471847.10191.hm10,S=227871 not retrieved (seen)
Jun 29 17:14:43 vmail getmail: msg 2311/2392 (40523 bytes) msgid 1277471892.11064.hm10,S=40523 not retrieved (seen)
Jun 29 17:14:43 vmail getmail: msg 2312/2392 (167754 bytes) msgid 1277472243.28556.hm10,S=167754 not retrieved (seen)
Jun 29 17:14:43 vmail getmail: msg 2313/2392 (640550 bytes) msgid 1277472390.12758.hm10,S=640550 not retrieved (seen)
Jun 29 17:14:43 vmail getmail: msg 2314/2392 (648867 bytes) msgid 1277473201.3409.hm10,S=648867 not retrieved (seen)
Jun 29 17:14:43 vmail getmail: msg 2315/2392 (55288 bytes) msgid 1277473593.5716.hm10,S=55288 not retrieved (seen)
Jun 29 17:14:43 vmail getmail: msg 2316/2392 (10284 bytes) msgid 1277475890.30952.hm10,S=10284 not retrieved (seen)
Jun 29 17:14:43 vmail getmail: msg 2317/2392 (3802 bytes) msgid 1277476112.25884.hm10,S=3802 not retrieved (seen)
Jun 29 17:14:43 vmail getmail: msg 2318/2392 (60562 bytes) msgid 1277476679.3448.hm10,S=60562 not retrieved (seen)
Jun 29 17:14:43 vmail getmail: msg 2319/2392 (12752 bytes) msgid 1277477977.15221.hm10,S=12752 not retrieved (seen)
Jun 29 17:14:43 vmail getmail: msg 2320/2392 (1662067 bytes) msgid 1277482402.21132.hm10,S=1662067 not retrieved (seen)
Jun 29 17:14:43 vmail getmail: msg 2321/2392 (11704 bytes) msgid 1277483939.13062.hm10,S=11704 not retrieved (seen)
Jun 29 17:14:43 vmail getmail: msg 2322/2392 (1652469 bytes) msgid 1277488644.10907.hm10,S=1652469 not retrieved (seen)
Jun 29 17:14:43 vmail getmail: msg 2323/2392 (45397 bytes) msgid 1277492495.21601.hm10,S=45397 not retrieved (seen)
Jun 29 17:14:43 vmail getmail: msg 2324/2392 (14762 bytes) msgid 1277512970.22227.hm10,S=14762 not retrieved (seen)
Jun 29 17:14:43 vmail getmail: msg 2325/2392 (5703 bytes) msgid 1277566323.1895.hm10,S=5703 not retrieved (seen)
Jun 29 17:14:43 vmail getmail: msg 2326/2392 (12438 bytes) msgid 1277683804.2608.hm10,S=12438 not retrieved (seen)
Jun 29 17:14:43 vmail getmail: msg 2327/2392 (628810 bytes) msgid 1277685700.23257.hm10,S=628810 not retrieved (seen)