Intermittent Error while sending email using Zimbra WebMail Client to newly added users, Error Message as shown below:
Message not sent; one or more addresses were not accepted.
msg: Invalid address: OSC <email@example.com>. com.zimbra.cs.mailbox.MailSender$SafeSendFailedException: MESSAGE_NOT_DELIVERED; chained exception is: com.zimbra.cs.mailclient.smtp.InvalidRecipientException: RCPT failed: Invalid recipient firstname.lastname@example.org: 550 5.1.1 <email@example.com>: Recipient address rejected: User unknown in local recipient table
Environment: CentOS 7.7 64bit
Zimbra OSE 8.8.15 for CentOS 7, Zimbra Patch 7 installed
Someone might have/had faced this issue for ZCS 8.8.15, please share the fix/resolutions for this issue.
Discuss your pilot or production implementation with other Zimbra admins or our engineers.
2 posts • Page 1 of 1
Issue resolved after removing additional added webmail url from Admin Console > Servers > MTA > Network > Webmail MTA hostnames.
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