簡介
本檔案介紹在思科電子郵件安全裝置(ESA)的郵件日誌中發現的「超出大小限制」錯誤訊息。
「郵件掃描問題：超出大小限制」是指？
在檢視ESA上的郵件日誌和郵件跟蹤時，您可能會看到以下錯誤，需要確定問題所在：
Tue Sep 9 13:37:35 2014 Warning: MID 15180223, Message Scanning Problem: Size
Limit Exceeded
在ESA上掃描對大型郵件有全域性限制。如果郵件太大，通常可以免除多次掃描，並將其傳送到最終收件人。
要從CLI更改消息掃描限制，請使用scanconfig。您需要調整「要掃描的附件的最大大小」選項，如突出顯示。
注意：請記住，設定的掃描大小越大，使用的裝置開銷和資源就越多。
myesa.loca> scanconfig
There are currently 5 attachment type mappings configured to be SKIPPED.
Choose the operation you want to perform:
- NEW - Add a new entry.
- DELETE - Remove an entry.
- SETUP - Configure scanning behavior.
- IMPORT - Load mappings from a file.
- EXPORT - Save mappings to a file.
- PRINT - Display the list.
- CLEAR - Remove all entries.
- SMIME - Configure S/MIME unpacking.
[]> setup
1. Scan only attachments with MIME types or fingerprints in the list.
2. Skip attachments with MIME types or fingerprints in the list.
Choose one:
[2]>
Enter the maximum depth of attachment recursion to scan:
[5]>
Enter the maximum size of attachment to scan:
[5242880]>
Do you want to scan attachment metadata? [Y]>
Enter the attachment scanning timeout (in seconds):
[1]>
If a message has attachments that were not scanned for any reason (e.g. because
of size, depth limits, or scanning timeout), assume the attachment matches the
search pattern? [N]>
In case of a content or message filter error, should all filters be bypassed? [Y]>
If a message could not be deconstructed into its component parts in order to remove
specified attachments, the system should:
1. Deliver
2. Bounce
3. Drop
[1]>
Configure encoding to use when none is specified for plain body text or anything with
MIME type plain/text or plain/html.
1. US-ASCII
2. Unicode (UTF-8)
3. Unicode (UTF-16)
4. Western European/Latin-1 (ISO 8859-1)
5. Western European/Latin-1 (Windows CP1252)
6. Traditional Chinese (Big 5)
7. Simplified Chinese (GB 2312)
8. Simplified Chinese (HZ GB 2312)
9. Korean (ISO 2022-KR)
10. Korean (KS-C-5601/EUC-KR)
11. Japanese (Shift-JIS (X0123))
12. Japanese (ISO-2022-JP)
13. Japanese (EUC)
[1]
如果對設定進行了任何更改和調整，請確保從主CLI提示符提交所有更改。
在許多情況下，您會發現特定郵件可能超出了掃描，但確實按最初預期處理和傳送。您需要研究和檢視您的郵件日誌，瞭解原始MID的最終處置情況。
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