my sent email is all of the sudden going to clients spam folders

email that I'm sending is now going to my customers spam boxes.  kinda happened out of the blue.  its not bulk emails.  its individual emails the i type with info for my clients.  i do copy/paste some info that goes into each email as well.

been working fine for years...its just all of the sudden everyone is saying that email is going to their junk boxes.  

its my own private domain email, i use gmail as the client for checking and sending it.

i havent changed anything on my end.  what do I need to look for to see what is going on?  TIA
coonastyAsked:
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Martin MillerCTOCommented:
If you are bulk sending, e.g. including a lot of other email addresses in the "to:"  or "bcc:" these may be your trigger into the SPAM box.

Can you clarify if you send ONE at a time, or bulk ?
Jason CrawfordTransport NinjaCommented:
Try running a blacklist check on the outbound WAN IP at https://mxtoolbox.com/blacklists.aspx.
timgreen7077Exchange EngineerCommented:
"its my own private domain email, i use gmail as the client for checking and sending it."
Not sure what that means.
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Jason CrawfordTransport NinjaCommented:
I guessed Gapps.
Martin MillerCTOCommented:
Please check site Jason mentioned above.
ITguy565Commented:
I would be willing to bet that the public IP that the mail server is using is Blacklisted. @Jason Crawford, I believe you may be right on this.
Scott Fell, EE MVEDeveloper & EE ModeratorCommented:
If your private domain and email is through a shared hosting service, this is common issue because you are sharing IP's with others that may get in trouble that will translate to everybody.  In this case, you need to contact your web host.  This is really not a good option for managing email but many do so because it is included in the price.

A better option would be to use gSuite, Office365 or other email specific provider.  Since you say you are using Google as your client, you may either already have gSuite or you have added your personal domain to gmail via accounts https://mail.google.com/mail/u/0/#settings/accounts.

If you are on gSuite, make sure you are set up for DKIM https://support.google.com/a/answer/174124?hl=en and you have a proper SPF record https://support.google.com/a/answer/33786?hl=en.  Using MXToolBox above, but I would start at the home page and put your domain name in the search box. From there you will get a list of your mx records with links to "Black List Check". You can just click on each link to test.

On the same tool at the home page, you can check DKIM, SPF and Brand Reputation as well.
coonastyAuthor Commented:
siteground hosts my domain/site.  i have gmail setup to check and send email for this address.  when i send, i can send as my gmail address or my company email.  i just have plain ole' charter internet at the house/office without a static so ip has changed multiple times im guessing since this all started.

however im not sure if outgoing email is grabbing a gmail associated ip address being its configured in there.
coonastyAuthor Commented:
also ive sent a couple tests that to new addresses ive never sent to and they went thru fine.  so its not every email but its at least 75% of them started going to junk mail.  of course once people unflag me as not spam its fine on their end.

and yes this is just one email at a time, do not send bulk emails ever.  TIA
ITguy565Commented:
Piggy Backing on @Scott *above*

Public services like Gmail use multiple different mail servers to send mail though. It is very possible that one of those servers has been used for a spam campaign as you are not the only address to pass traffic though those servers. If the other servers get loaded down and you send mail and just happen to get that one server that is blacklisted then your message would get rejected, this might appear as an intermittent failure and could also explain why it is happening sometimes and not others.

There are numerous other reasons this could occur as well, but this seems the most likely.
Scott Fell, EE MVEDeveloper & EE ModeratorCommented:
> siteground hosts my domain/site.  i have gmail setup to check and send email

This is the scenario I mentioned. "your private domain and email is through a shared hosting service"

That is your issue. The ip of your home, office, phone does not really come into play. It is the IP of the email server, not necessarily your current location. You probably have the $4 or $6 plan that comes with email and that is your issue.  

Pay the $5/monthly fee and get your email hosted through gsuite instead of your shared hosting. That will increase your deliverability. If I had to do it over, I would opt for office365 because the support is a lot better and that is another topic. But get yourself out of shared hosting email and get to gsuite or office365.  An alternative is to use a 3rd party smtp service like sendgrid.com for your outgoing mail, but gsuite or o365 will do a much better job with your incoming spam.

If you don't want to go the route of using an email provider, your only hope is to contact siteground and see what they can do for switching out ip's and banning whoever is creating the issue.  If that works, it will only be temporary until it happens again.
Scott Fell, EE MVEDeveloper & EE ModeratorCommented:
To add, I would still make sure you have DKIM and SPF records set up using MXToolbox or the like.
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