Fix HELO

[seovalencia]

My IP has been blocked on spamhaus.com and abuseat.org.
The reason is:
"HELOs as 192.168.0.104. Not only is this a violation of RFC2821/5321 section 4.1.1.1, it's even more frequently a sign of infection."
Any idea to fix the HELO when checking the emails of my newsletter users?

[JurgenG]

A little late now, but you could use a rotating proxy, for example with TOR, changing your IP address every 100 (or whatever) tested accounts.

[seovalencia]

Thanks , but I think the tor's IP have low quality and are banned by default. I only use TOR for low level websites not for microsoft or gmail.

[JurgenG]

I have used rotating TOR IP's for performing security audits for big organisations. Never had an IP blocked because it was a TOR exit node (and if it would be, I'd just switch to a new IP). As TOR exit nodes are typically end users, I don't think you can consider them of low quality. But I don't intend to discuss this as it was only an example. You could obviously also use a VPN service, where you pay some money to get premium IP addresses (I would recommend to check if the VPN allows this)

[alexherington]

I had a similar issue so I made a pull request with an additional feature to pass an alternative hostname to SMTP HELO - #67