我使用sendmail / openldap在地理位置分散的群集中传递邮件。这在很大程度上是有效的，但我遇到邮件转发问题。
当我为同一域内的用户设置LDAP mailRoutingAddress时，sendmail不会获取最终收件人的mailHost，而是执行本地传递。我意识到这是预期的行为，但我需要找到一种方法让sendmail在为mailRoutingAddress（ldapmra）完成map_rewrite之后为新收件人执行LDAP mailHost查找（ldapmh）。
我希望某人有一些严肃的sendmail-fu，可以建议一种方法，可以修改sendmail规则以注入LDAP mailHost查找（请参阅解析器输出中的## COMMENT）。
典型的LDAP条目可能如下所示：
dn: uid=allan, dc=my, dc=example
mailLocalAddress: allan@my.example
mailRoutingAddress: babs@my.example
dn: uid=babs, dc=my, dc=example
mailLocalAddress: babs@my.example
mailHost: east.my.example
dn: uid=chuck, dc=my, dc=example
mailLocalAddress: chuck@my.example
mailHost: west.my.example
dn: uid=diane, dc=my, dc=example
mailLocalAddress: diane@my.example
mailRoutingAddress: someuser@freemail.example
以下是解析器输出示例
mailgw# sendmail -d -bt
Version 8.14.7
###debug output redacted
============ SYSTEM IDENTITY (after readcf) ============
(short domain name) $w = mailgw
(canonical domain name) $j = mailgw.my.example
(subdomain name) $m = my.example
(node name) $k = mailgw.my.example
========================================================
ADDRESS TEST MODE (ruleset 3 NOT automatically invoked)
Enter <ruleset> <address>
> /parse allan@my.example
crackaddr(allan@my.example)
crackaddr=>` 0x81 g'
Cracked address = 0x81 g
Parsing envelope recipient address
--parseaddr(allan@my.example)
canonify input: allan @ my . example
Canonify2 input: allan < @ my . example >
map_lookup(host, my.example) => host_map_lookup(my.example) => map_rewrite(my.example), av =
my.example
map_rewrite => my.example.
FOUND my.example
my.example. (0)
Canonify2 returns: allan < @ my . example . >
canonify returns: allan < @ my . example . >
parse input: allan < @ my . example . >
Parse0 input: allan < @ my . example . >
map_lookup(dequote, allan) => NOT FOUND (0)
Parse0 returns: allan < @ my . example . >
ParseLocal input: allan < @ my . example . >
ParseLocal returns: allan < @ my . example . >
Parse1 input: allan < @ my . example . >
LDAPExpand input: < allan < @ my . example . > > < allan @ my . example > < >
map_lookup(ldapmra, allan@my.example) => map_rewrite(babs@my.example), av =
allan@my.example
map_rewrite => babs@my.example
babs@my.example (0)
map_lookup(ldapmh, allan@my.example) => NOT FOUND (68)
canonify input: babs @ my . example
Canonify2 input: babs < @ my . example >
map_lookup(host, my.example) => host_map_lookup(my.example) => CACHE my.example
#### COMMENT: This is where I need to dip LDAP
map_rewrite(my.example), av =
my.example
map_rewrite => my.example.
my.example. (0)
Canonify2 returns: babs < @ my . example . >
canonify returns: babs < @ my . example . >
Parse0 input: babs < @ my . example . >
map_lookup(dequote, babs) => NOT FOUND (0)
Parse0 returns: babs < @ my . example . >
LDAPExpand returns: babs < @ my . example . >
map_lookup(virtuser, babs@my.example) => map_rewrite(babs), av =
babs@my.example
babs
map_rewrite => babs
babs (0)
Recurse input: babs
canonify input: babs
Canonify2 input: babs
Canonify2 returns: babs
canonify returns: babs
parse input: babs
Parse0 input: babs
map_lookup(dequote, babs) => NOT FOUND (0)
Parse0 returns: babs
ParseLocal input: babs
ParseLocal returns: babs
Parse1 input: babs
Parse1 returns: 0x96 local 0x98 babs
parse returns: 0x96 local 0x98 babs
Recurse returns: 0x96 local 0x98 babs
Parse1 returns: 0x96 local 0x98 babs
parse returns: 0x96 local 0x98 babs
2 input: babs
2 returns: babs
EnvToL input: babs
EnvToL returns: babs
final input: babs
final returns: babs
parseaddr-->0xbfbfd8c0=allan@my.example:
mailer 8 (local), host `'
user `babs', ruser `<null>'
state=OK, next=0x0, alias 0x0, uid 0, gid 0
flags=180<QPINGONFAILURE,QPINGONDELAY>
owner=(none), home="(none)", fullname="(none)"
orcpt="(none)", statmta=(none), status=(none)
finalrcpt="(none)"
rstatus="(none)"
statdate=(none)
mailer local, user babs