常见退信问题解决方案
一、收件人格式有问题
关键字:syntax
退信信息例子:
501 Invalid or missing command argument(s)
501 Bad address syntax.
http://service.mail.qq.com/cgi-bin/help?subtype=1&&id=20022&&no=1000730
二、对用用户不存在
关键字:No such user、 unknown、illegal alias、account
inactive、user、not found、Invalid recipient、 not a
valid、mailbox、cannot be delivered、Args、Unable to
relay
退信信息例子:
550 5.1.1 User unknown
550 User not found: xxxxxddd@126.com
554 delivery error: dd This user doesn\'t have a yahoo.com
account
550 , Recipient unknown (in reply to RCPT TO
command)
No such user
unknown or illegal alias:??????
host [] said: 550 , No such user.
user account inactive
User ***@ is not found in
Server.
invalid address
host ……said: 550 Invalid
recipient
host ……said: 550 5.7.1 Unable to relay
host …… said: 552 5.0.0 Transaction Failure. Invalid
Args.
550 : Recipient address rejected: User unknownin local
recipient table
550 Requested action not taken: mailbox unavailable
三、收件人用户被禁用
关键字:disabled
退信信息例子:
User xxx@ is disabled
host [] said: 550 is now disabled with SMTP
service.
host……said: 554 delivery error: ??? Sorry your message to
?????@
cannot be delivered. This account has been disabled or
discontinued
四、对方邮箱空间不够,无法接收新邮件?
关键字: Quota、exceed、hard limit、exceeding、storage
allocation
退信信息例子:
Quota exceed the hard limit for user
?????@
host …… said: 552 This person\'s account is exceeding their
quota.
exceeded storage allocation
552 Channel Size Limit
exceeded
五、发送的邮件过大,造成接收方服务器拒收?
关键字: exceeds 、maximum message size、Data
size
退信信息例子:
552 Message size exceeds fixed maximum message size: 7372800
bytes
552 5.2.3 Message size exceeds fixed maximum message size
(7200000)
host [] said: 552 Data size must not exceed
4096Kbytes.
552 #5.3.4 message size exceeds limit
552 Error: message too large
退信原因:
由于发送方的邮件容量过大导致接收方的系统服务商拒收此邮件。
六、邮件群发包含过多用户?
关键字: Too many、less than 20
退信信息例子:
: 553 Too many recipients in the mail, should less than
20
退信原因:过多投递者(邮件系统指令)。
七、DNS解析问题、无法查找对方服务器
退信信息例子:
DNS: 10 second wait for DNS response
exceeded (attempt 1 of 3)
The name server reports that it is having
technical problems
关键字: Host、not found、bad host、domain 、unreachable、Connection
refused
退信信息例子:
: Name service error for domain : Host not found : Name service
error
for domain : Host not found, try
again
: Name service error for domain hot.: Host not
found
: bad host/domain syntax: ""
<****@> : connect to : Connection
refused
: domain unreachable
(不存在@这个域的邮件系统的)
八、25端口连接问题(SMTP端口)
九、网络问题(多方面)
退信提示Socket connection closed by the other
side (how rude!)或Winsock Error 10053 Connection
abort。产生这种退信的原因有
(1)发送的附件大,于是产生网络连接问题,请发送小点的附件。
(2)退信提示Socket connection closed by the other side (how
rude!),Winsock Error 10053 Connection abort,一般为对方服务器或网络问题。
(3)网络延时问题,请查看网络流量使用情况。
(4)邮件服务器和发送端电脑的杀毒软件影响,把杀毒软件的“邮件监控”关掉。
(5)网络前端有防火墙,防火墙中有设置关于邮件方面或smtp方面的设置,关闭此项设置。
(6)中国国家防火墙(GFW)的误判与干扰
(7)国内与国外之间的网络连接速度等问题
如果和国外通信频繁,建议在国外架设一台服务器或使用国外的邮件服务器代发与代收。
国内与国外发送邮件,存在几个问题:
(1)“中国国家防火墙(GFW)”的误判与干扰
(2)国内与国外的之间的网络速度问题
十、对方服务器/临时性问题
关键字:please try later
退信例子:
451 Temporary local problem - please try later
两种可能性:
(1) 对方服务器真出现了临时错误,而不能接收邮件
(2) 对方服务器采用的一种反垃圾机制,一般而言重发才接收
十一、由反病毒引起的退信
550 Error: Possible VIRUS (W32/Netsky@MM)
失败原因:对方系统认为你的邮件是病毒(蠕虫)。
十二、其它退信
530 5.7.0 Must issue a STARTTLS command first.
d7sm5726181tib.4
失败原因:对方邮件系统需要进行TLS通讯,您这边必须得启动SMTP TLS加密通讯。
十三、由反垃圾引起的退信
1、反向解析(PTR):
450 4.7.1 Client host rejected: cannot find your
hostname
554- (RTR:CH)
http://postmaster.info.aol.com/errors/554rtrch.html
550 We cannot accept email from IP 113.106.88.154 without a
DNS PTR record. Contact your ISP/HSP to set up PTR record for your
server
554 This server requires PTR for unauthenticated
connections.
550 rejected because RDNS
550 5.7.1 … Relaying denied.IP name lookup failed []
退信中如果有类似上述的内容(ptr或rdns等),则说明发件方公网IP地址没有做反向解析记录,需要联系下ISP做下。
2、反垃圾组织(RBL)
501 5.7.1
... Sender
refused by the DNSBL zen.spamhaus.org
501 5.7.1
...
Sender refused by the DNSBL combined.njabl.org
553 Mail from 125.91.0.4 not allowed - 5.7.1 [BL23]
Connections not accepted from IP addresses on Spamhaus XBL; see
http://postmaster.yahoo.com/errors/550-bl23.html
3、其它
554 Message was rejected.
失败原因:对方拒收。
554 DT:SPM mx16, QsCowLCLagH6jMdITTNkmg==.38632S2
1221037307
失败原因:554 DT:SPM 发送的邮件内容包含了未被网易许可的信息,或违背了网易的反垃圾服务条款。
550 #5.7.1 Your access to submit messages to this e-mail
system has been rejected.
失败原因:可能进了反垃圾组织黑名单中,到这里面去查下IP并申诉http://www.kloth.net/services/dnsbl.php
550OU-001(SNT0-MC3-F9)Unfortunately,messagesfromweren\'tsent.PleasecontactyourInternetserviceprovidersincepartoftheirnetworkisonourblocklist.Youcanalsoreferyourprovidertohttp://mail.live.com/mail/troubleshooting.aspx#errors.
失败原因:查看这个链接http://mail.live.com/mail/troubleshooting.aspx#errors.到这里面去查下IP并申诉http://www.kloth.net/services/dnsbl.php
__________________
陈彦博
邮件事业部 技术支持工程师
北京春笛网络信息技术服务有限公司
北京海淀区知春路23号863软件园量子银座903室 100191
电话:010-82356575-6023
传真:010-82356575-6004
手机:18622575102
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