Problems with people receiving emails from Mail!

[jbrown]

MBP High Sierra.

90% of my emails wind up in peoples junk folder, when sending from mail.

This started when I began temporarily working abroad. It seems to affect none Mail recipients.
At first I thought I'd narrowed it down to gmail accounts , but I just sent a mail to an Hotmail account, and the same...straight to their spam folder.....any ideas?

Thanks

 

[Mikael H]

When mail from you wind up in the recipient’s junk folder, you have a problem either with the format of your mail content (it looks spammy), or with your outgoing server’s reputation (it looks like a spammer).

On the most basic level, check your domain’s reputation using https://mxtoolbox.com. If you are on several blacklists, you can be pretty sure that your mail server is misconfigured (most likely to allow anonymous relaying of mail), or possibly that you have malware-infested machines in your organization, which use your mail server to send spam.

Once you’re confident your basic server configuration is sane, research the following concepts:
SPF records - which tell the recipient from which servers they can expect to receive mail from your domain name.
DKIM signing - which proves that mail has passed an MTA controlled by you, and (to a certain degree) that the content has not been tampered with since.
DMARC records - which allow compliant servers to self-report on mail received from your domain, in turn allowing you to see if anyone is abusing your domain name.


(If you’re not at all interested in email security, do everyone a favor and rent that service from a reputable company. If you’re already renting this service, your provider shouldn’t be in this particular business. Switch to a better one.)

 

[jbrown]

When mail from you wind up in the recipient’s junk folder, you have a problem either with the format of your mail content (it looks spammy), or with your outgoing server’s reputation (it looks like a spammer).

On the most basic level, check your domain’s reputation using https://mxtoolbox.com. If you are on several blacklists, you can be pretty sure that your mail server is misconfigured (most likely to allow anonymous relaying of mail), or possibly that you have malware-infested machines in your organization, which use your mail server to send spam.

Once you’re confident your basic server configuration is sane, research the following concepts:
SPF records - which tell the recipient from which servers they can expect to receive mail from your domain name.
DKIM signing - which proves that mail has passed an MTA controlled by you, and (to a certain degree) that the content has not been tampered with since.
DMARC records - which allow compliant servers to self-report on mail received from your domain, in turn allowing you to see if anyone is abusing your domain name.


(If you’re not at all interested in email security, do everyone a favor and rent that service from a reputable company. If you’re already renting this service, your provider shouldn’t be in this particular business. Switch to a better one.)

[doublepost=1533995441][/doublepost]Thanks so much for taking the time to reply. Your taking to someone ( me ) who know not a lot about what you describe.

I don't even know what a domain is LOL ( let alone what the right configuration should be! ) - I will be looking into it though.

Nor do I know what a :

SPF is
DKIM
MTA
DMARC

I'm not in a company so do not have an IT dept. to help me out. I'm just an individual, with over 10 years of trouble free email...I send, they receive.

The receivers will get this message....if it helps:

" This message has a from address in mac.com but has failed mac.com's required tests for authentication."

Thanks for your help!

Bit more info.....If I sent an email from my iCloud page in a browser window...I dont seem to have this problem!!!

 

[mpainesyd]

Try changing your email address to xxxx@icloud.com instead of xxxx@mac.com. They are effectvely the same (Apple Mail) but mac.com might no longer be recognised as a valid/secure server any more.
Search the Apple Support for advice about this.