請教一下大家:
最近發現有部分發出的mail都會被退信,訊息如下:
第一種: lost connection with xxx.com[IP] while performing the HELO handshake
第二種: lost connection with xxx.com[IP] while receiving the initial server greeting
大部份的mail都還是可以發出去,對方也收得到,只是有部分的會被退信,請教一下這是甚麼原因?
謝謝
lost connection
網路問題大
不過還是要有完整的交談 log 可以直接看出原因
@X.it>, relay=mail.X.it[217.221.X.X]:25, delay=145511, delays=145507/0.01/3.4/0, dsn=4.4.2, status=deferred (lost connection with mail.X.it[217.221.X.X] while performing the HELO handshake)
May 25 08:23:38 mail postfix/smtp[9069]: 7A944183C002: to=X@X.it, relay=mail.X.it[217.221.X.X]:25, delay=239620, delays=239616/0/3.4/0, dsn=4.4.2, status=deferred (lost connection with mail.X.it[217.221.X.X] while performing the HELO handshake)
May 25 08:23:38 mail postfix/smtp[9073]: C7D8F183C001: to=X@X.it, relay=mail.X.it[217.221.X.X]:25, delay=59510, delays=59507/0.01/3.3/0, dsn=4.4.2, status=deferred (lost connection with mail.X.it[217.221.X.X] while performing the HELO handshake)
May 25 08:23:37 mail postfix/smtp[9074]: 41501183C007: to=X@X.it, relay=mail.X.it[217.221.X.X]:25, delay=77265, delays=77262/0.01/3/0, dsn=4.4.2, status=deferred (lost connection with mail.X.it[217.221.X.X] while performing the HELO handshake)
May 25 08:23:37 mail postfix/smtp[9071]: certificate verification failed for mail.X.it[217.221.X.X]:25: untrusted issuer /C=XY/ST=Snake Desert/L=Snake Town/O=Snake Oil, Ltd/OU=Certificate Authority/CN=Snake Oil CA/emailAddress=ca@snakeoil.dom
May 25 08:23:37 mail postfix/smtp[9069]: certificate verification failed for mail.X.it[217.221.X.X]:25: untrusted issuer /C=XY/ST=Snake Desert/L=Snake Town/O=Snake Oil, Ltd/OU=Certificate Authority/CN=Snake Oil CA/emailAddress=ca@snakeoil.dom
May 25 08:23:37 mail postfix/smtp[9073]: certificate verification failed for mail.X.it[217.221.X.X]:25: untrusted issuer /C=XY/ST=Snake Desert/L=Snake Town/O=Snake Oil, Ltd/OU=Certificate Authority/CN=Snake Oil CA/emailAddress=ca@snakeoil.dom
建議先情查退信歷史紀錄,如果是在固定某些時間點發生的退信情況,斷線原因可以朝MAIL SERVER中的ANTIVIRUS或是其他應用軟體執行某些排程工作的運行紀錄進行分析,查驗是否有發生網路通信上的影響?如果無法從記錄檔內容判斷,建議您嘗試發送幾封測試郵件到GMAIL等類似規模的公眾郵箱與發生退信的郵箱進行線上即時觀察HANKSHAKE情況再比對兩者相異之處,確定在哪個步驟產生HANKSHAKE FAIL,再來進行處理,如果無法自行判斷處理,也可以挑選幾組近期不同退信情況的完整HANDSHAKE紀錄貼上來請求協助。
@X.it>, relay=mail.X.it[217.221.X.X]:25, delay=145511, delays=145507/0.01/3.4/0, dsn=4.4.2, status=deferred (lost connection with mail.X.it[217.221.X.X] while performing the HELO handshake)
May 25 08:23:38 mail postfix/smtp[9069]: 7A944183C002: to=X@X.it, relay=mail.X.it[217.221.X.X]:25, delay=239620, delays=239616/0/3.4/0, dsn=4.4.2, status=deferred (lost connection with mail.X.it[217.221.X.X] while performing the HELO handshake)
May 25 08:23:38 mail postfix/smtp[9073]: C7D8F183C001: to=X@X.it, relay=mail.X.it[217.221.X.X]:25, delay=59510, delays=59507/0.01/3.3/0, dsn=4.4.2, status=deferred (lost connection with mail.X.it[217.221.X.X] while performing the HELO handshake)
May 25 08:23:37 mail postfix/smtp[9074]: 41501183C007: to=X@X.it, relay=mail.X.it[217.221.X.X]:25, delay=77265, delays=77262/0.01/3/0, dsn=4.4.2, status=deferred (lost connection with mail.X.it[217.221.X.X] while performing the HELO handshake)
May 25 08:23:37 mail postfix/smtp[9071]: certificate verification failed for mail.X.it[217.221.X.X]:25: untrusted issuer /C=XY/ST=Snake Desert/L=Snake Town/O=Snake Oil, Ltd/OU=Certificate Authority/CN=Snake Oil CA/emailAddress=ca@snakeoil.dom
May 25 08:23:37 mail postfix/smtp[9069]: certificate verification failed for mail.X.it[217.221.X.X]:25: untrusted issuer /C=XY/ST=Snake Desert/L=Snake Town/O=Snake Oil, Ltd/OU=Certificate Authority/CN=Snake Oil CA/emailAddress=ca@snakeoil.dom
May 25 08:23:37 mail postfix/smtp[9073]: certificate verification failed for mail.X.it[217.221.X.X]:25: untrusted issuer /C=XY/ST=Snake Desert/L=Snake Town/O=Snake Oil, Ltd/OU=Certificate Authority/CN=Snake Oil CA/emailAddress=ca@snakeoil.dom
附上SMTP紀錄 麻煩大家了
字串太長所以排版很亂 不好意思