這樣算不算被人當轉信呢?看的出來嗎?【求助】

我的系統寄一封信上面有這樣的訊息

g58Liie01924: g58Like01925: DSN: Return receipt
NOQUEUE: cm064.50.234.24.lvcm.com [24.234.50.64] did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA
g58Nlge02340: ruleset=check_rcpt, arg1=<[email protected]>, relay=208-191-23-208.starnetok.net [208.191.23.208] (may be forged), reject=550 5.7.1 <[email protected]>... Relaying denied. IP name possibly forged [208.191.23.208]
g590GQe02446: ruleset=check_rcpt, arg1=<[email protected]>, relay=[205.136.61.210], reject=550 5.7.1 <[email protected]>... Relaying denied. IP name lookup failed [205.136.61.210]
g599A1e04273: ruleset=check_rcpt, arg1=<[email protected]>, relay=208-191-23-132.starnetok.net [208.191.23.132] (may be forged), reject=550 5.7.1 <[email protected]>... Relaying denied. IP name possibly forged [208.191.23.132]
g59AOve04514: ruleset=check_rcpt, arg1=<[email protected]>, relay=24-205-149-23.riv-dyn.charterpipeline.net [24.205.149.23], reject=550 5.7.1 <[email protected]>... Relaying denied
g59ATKe04530: ruleset=check_rcpt, arg1=<[email protected]>, relay=208-191-23-236.starnetok.net [208.191.23.236] (may be forged), reject=550 5.7.1 <[email protected]>... Relaying denied. IP name possibly forged [208.191.23.236]

請各位先進,這樣算不算被當轉信站呢?
要從哪裡看呢?
我用 SendMail 又要如何防範呢?

請各位先進教教我!
先謝謝囉!