简介
本文档介绍在思科邮件安全设备(ESA)的邮件日志中发现的“超出大小限制”(Size Limit Exceeded)错误消息。
“Message Scanning Problem： Size Limit Exceeded”是什么意思？
在ESA上查看邮件日志和邮件跟踪时，您可能会看到以下错误并需要确定问题所在：
Tue Sep 9 13:37:35 2014 Warning: MID 15180223, Message Scanning Problem: Size
Limit Exceeded
在ESA上扫描对大邮件有全局限制。 如果邮件太大，通常会免除多次扫描，并将其发送给最终收件人。
要从CLI更改消息扫描限制，请使用scanconfig。您将需要对突出显示的“要扫描的附件的最大大小”选项进行调整。
注意：请记住，设置的扫描大小越大，使用的设备开销和资源就越多。
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]
如果对设置进行了任何更改和调整，请务必在主CLI提示符下提交所有更改。
在许多情况下，您会发现特定邮件可能超出了扫描范围，但确实按最初预期进行了处理和传送。您需要研究和查看邮件日志，了解原始MID的最终处置情况。
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