try adding the server on the /etc/npt.conf file. Sender Verification, "envelope Senders whose domain does not … The response from the remote server was: 553 5.1.8 - Domain of sender address xxx@``cmyclientsdomain.com does not exist" Any … 553 #5.1.8 Domain of sender address does not exist (in reply to MAIL FROM command)) Why does it always try to send from and how can I stop it? You need to fix your domain name in the postfix configuration (domain.local is not a valid domain name). I had been configuring the myhost.mc file and running make to the rebuild the sendmail.cf file. error: Domain of sender address does not exist 421 4.1.8 - ERROR: Domain of sender address EMAIL_ADDRESS_GOES_HERE does not resolve 554 5.1.8 - ERROR: Domain of sender address EMAIL_ADDRESS_GOES_HERE does not exist Road Runner requires that the sender of every email inbound to its systems be from a domain which exists in the DNS. You sendmail thinks that envelope sender's domain walkingtree.in does not exist (no MX, A, AAAA DNS records). It refuses to accept messages with such envelope sender because there will be no way to send back (eventual) bounce messages (reports about email delivery problems). You may use nslookup (or dig) to check if the server sees the DNS records: I can get rid of this problem but then I … In response to marc.luescherFRE. Some features may be licensed as add-ons, but may also be included as part of a bundle. Diagnostic-Code: SMTP; 553 5.1.8 ... Domain of sender address bc00644@dev-app01-wms.domain.fds does not exist. If you use the order "files dns" in /etc/nsswitch.conf, then your system will use first /etc/hosts in order to resolve a domain/hostname and if doesn't succeed it will use a dns resolver. メールの受信を許可しておりません。. Probably they are performing the test by trying to resolve it to an IP address, which will fail. Check /etc/postfix/main.cf, there are a f... Although, while most of the external addresses I am sending to are working, I am having problems sending to one address. rdrtx1, thanks for your suggestion , I checked , multiple environment (including those where mailx is working) there are no server informaton here.. I guess not! This falls into the category of "envelope senders whose domain does not exist." User unknown > <<< 503 5.0.0 Need RCPT (recipient) Configure … Bounce message: 553 #5.1.8 Domain of sender address does not exist. SMTP error from remote mail server ... Domain of sender address ... 553 Domain of Sender address ～ dose not exist [表示例] 受信者の 1 人がサーバーによって拒否されたため、メッセージを送信できませんでした。 ～ (中略) ～ '553 5.3.0 メールアドレス>... Domain of sender address メールアドレス does not exist 原因1）の場合. Solve the problem by creating a CNAME atrecruitement.be -> www.atrecruitment.be. You can delete your own text from the message returned below. When I send from telnet it is fine, because I can clearly specify a sender. Workaround. [SOLVED] Domain of sender address does not exist