2 servers running directadmin 1 for mail and 1 for hosting

[Cephas]

Hi all,

I need some help because I'm getting 550 Bad HELO errors.

I have 1 domain (microsupplies.nl) that runs on lets say ServerA where I also want to run my email.
I have a second server lets say ServerB that runs the website with wordpress. Everytime I try to send a testemail using WP mail SMTP it fails and says 550 Bad HELO.

I have tried several things but really can't figure it out. Both servers run DirectAdmin.

Things already done and/or tried:

• MX Records > Use this server to handle my e-mails. If not, change the MX records and uncheck this option. (unchecked). - ServerB
• Mail DNS records (ipv6 records as well) point to ServerA - ServerB
• Website DNS Records point to ServerB - ServerA
• Send mail with authentication trough port 587 (you must use email credentials) - Wordpress environment on ServerB
  I've also tried without SMTPAutoTLS using SSL.

Note: NS records on ServerB are ns1 ns2.domain.com while on ServerA they are ns1 ns2.domain.com

I hope someone can help me out with this problem as I've been struggling for a few days now.

 

[Active8]

Try to send mail with authentication trough port 587 (you must use email credentials)

 

[Cephas]

Try to send mail with authentication trough port 587 (you must use email credentials)

I have done that, I've also tried without SMTPAutoTLS using SSL.

 

[Active8]

try STARTTLS as SSL

 

[Cephas]

I unfortunately dont have the option to use STARTTLS. I'm using WP Mail SMTP which only allows TLS and SSL.

 

[Active8]

Ok, try to fix the bad HELO thing then, old post of mine:

Found a post that can help other people
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Hi i've faced the same problem, i've solved it by editing exim.conf in the mail server like this

just after #EDIT#16
hostlist relay_hosts = net-lsearch;/etc/virtual/pophost

i've added this line

hostlist allowed_helo = net-lsearch;/etc/virtual/allowed_helo

and changed #EDIT#25 from this

# deny if the HELO pretends to be one of the domains hosted on the server
deny message = HELO_IS_LOCAL_DOMAIN
condition = ${if match_domain{$sender_helo_name}{+local_domains}{true}{false}}
hosts = ! +relay_hosts
accept

to this

# deny if the HELO pretends to be one of the domains hosted on the server
deny message = HELO_IS_LOCAL_DOMAIN
condition = ${if match_domain{$sender_helo_name}{+local_domains}{true}{false}}
hosts = ! +relay_hosts
hosts = ! +allowed_helo
accept

finally i've added the first server ip in /etc/virtual/allowed_helo and restarted exim