我从其他地方获取了代码片段并创建了一个脚本来压缩现有的 maildir 电子邮件(需要停止 Dovecot,因为我不检查锁)。
#!/bin/bash
store=/var/vmail/mydomain.com
find "$store" -type d -name "cur" | while read maildir; do
tmpdir=$(cd "$maildir/../tmp" &>/dev/null && pwd) || exit 1
find=$(find "$maildir" -type f -name "*,S=*" ! -name "*,*:2,*,*Z*" -printf "%f\n")
if [ -z "$find" ]; then
echo continue
continue
fi
echo "$find" | while read filename; do
if file "$maildir/$filename" | grep -q "SMTP mail, "; then
echo 'Uncompressed' "$filename"
flags=$(echo $filename | awk -F:2, '{print $2}')
if echo $flags | grep ','; then
newname=$filename"Z"
else
newname=$filename",Z"
fi
srcfile="$maildir/$filename"
tmpfile="$tmpdir/$filename"
dstfile="$maildir/$newname"
gzip -c "$srcfile" > "$tmpfile" &&
chown --reference="$srcfile" "$tmpfile" &&
chmod --reference="$srcfile" "$tmpfile" &&
touch --reference="$srcfile" "$tmpfile"
if [ -f "$srcfile" ] && [ -f "$tmpfile" ]; then
mv "$tmpfile" "$srcfile" &&
mv "$srcfile" "$dstfile"
else
rm -f "$tmpfile"
fi
elif file "$maildir/$filename" | grep -q "gzip compressed data"; then
echo 'Compressed' "$filename"
else
echo 'Unknown type'
fi
done
done
但是我意识到我的入站邮件没有被找到,因为并非所有的电子邮件都符合查找标准-name "*,S=*"
例子
find "/var/vmail/mydomain.com" -type d -name "cur" | while read maildir; do find "$maildir" -type f -name "*,S=*" ! -name "*,*:2,*,*Z*" -printf "%f\n"; done
会发现这些:
/var/vmail/mydomain.com/Maildir/.Sent/cur
1580000001.M10001P10008.ip-172-1-1-100,S=14037,W=14302:2,Sa
1580000002.M20002P10009.ip-172-1-1-100,S=3784,W=3888:2,S
但不是这些:
/var/vmail/mydomain.com/Maildir/.INBOX/cur
1580000003.Vca01I80f58M300003.ip-172-1-1-100:2,S
1580000004.Vca01I80de7M400004.ip-172-1-1-100:2,Sa
1580000005.Vca01I85252M400005.ip-172-1-1-100:2,RS
1580000006.Vca01I83ffeM400006.ip-172-1-1-100:2,Sb
1580000007.Vca01I8159aM400007.ip-172-1-1-100:2,RSa
1580000008.Vca01I84015M400008.ip-172-1-1-100:2,Sab
我可以轻松更改 find 命令以匹配入站邮件,但由于查找标准来自其他地方,我想知道是否有明确的原因"*,S=*"
?
附言。请注意,邮件不是通过 Dovecot 接收的,入站邮件由postfix 提取,将邮件直接保存到相关目录,下面以 postfix 变量为例。
virtual_mailbox_base: /var/vmail
virtual_mailbox_maps: ldap lookup, %d/%u/Maildir/