Simple steps to fix email error 550 in Outlook 2013, 2016, 2010 & 2007 when you got error 550 during sending a message with outlook. If you do not want to use your ISPs server for SMTP, and the ISP is blocking port 25, you can switch the port to 587 for your outgoing mail and use mail.yourdomain.com for the SMTP server name. You may well put Plusnet in the amateur category, but you might want to put every other ISP in the same category! 550 Sender verify failed. It sounds like her mail client would be identifying the return address as <> but that's not the case according to the Exchange SMTP logs. Apparently, the on-premises mail gateway rejected the message, because … All somewhere else to fix this then. If you have been sending mass messages, such as newsletters, to a number of recipients with BellAliant hosted email, your ISP-provided IP address may have been blacklisted and not the Websavers server. In this event, our clients have been able to resolve this issue by having their ISP change their dynamic IP … Any ideas? 550 Empty envelope senders not allowed. Use this forum if you have installed hMailServer and want to ask a question related to a production release of hMailServer. DO NOT leave the directory at 777, it is not secure, just for quick testing. Reason: [{LED=550 permanent failure for one or more recipients ‎(emailaddress:550 Empty envelope senders not allowed) So, what does this “550 Empty envelope senders not allowed” message tell us? 755 is usually appropriate if you have everything set up correctly. If it works you know you have a problem with the permissions. Basically, you can only use our outgoing email server to send emails when you are connected to … Before posting, please read the troubleshooting guide.A large part of all reported issues are already described in detail here. This article is specific to users of 3dcart Shopping Cart Software. J'envoie depuis des années des mails avec une adresse en @seyman.fr (domaine qui m'appartient). JeffMa 11,186 Points 2014-01-29 10:59 In active mode, the client opens a socket on the local 550 No Connections Allowed From Your Ip Filezilla to be responsible for the NAT and firewall configuration. Depuis aujourd'hui, le serveur smtp bloque l'envoi de ces mails avec le message d'erreur "550 5.7.1 : Sender address rejected: sender address not … I've seen a fair amount of errors, but this one's new to me. Try setting the permissions on the directory to 777.