Hi, I've a dedicated server with Debian 9, Plesk Obsidian 18.0.27 and hostname pleskserver.domain.com and IP XX.XX.XX.XXX. I've installed 8 IP's to split customers: YY.YY.YY.YYY, ZZ.ZZ.ZZ.ZZZ, etc.
One customer is hosted in YY.YY.YY.YYY, when I send an email using Outlook or Thunderbird, Helo is correct because use mail.clientdomain.com (A record to YY.YY.YY.YYY) and rDNS is ok.
But when I send an email using Roundcube webmail, Helo shows pleskserver.domain.com instead webmail.clientdomain.com, so rDNS is not correct because IP's are different.
Why webmail use server hostname instead webmail.clientdomain.com?
Thanks, best regards.
One customer is hosted in YY.YY.YY.YYY, when I send an email using Outlook or Thunderbird, Helo is correct because use mail.clientdomain.com (A record to YY.YY.YY.YYY) and rDNS is ok.
But when I send an email using Roundcube webmail, Helo shows pleskserver.domain.com instead webmail.clientdomain.com, so rDNS is not correct because IP's are different.
Why webmail use server hostname instead webmail.clientdomain.com?
Thanks, best regards.