emails from php (hostopia)

[#1]

Hi, sorry to perhaps resurrect and old topic (see 'Delays to email coming from PHP on Hostopia')  but I have noticed today we are not receiving emails from our website (on hostopia) which seems to follow the pattern of that old post. Since that time have duplicated on gmail, and they are arriving ok but those through plusnet mail are getting marked as spam. Changing my settings from 'discard obvious spam' gets them through ok (but then we get all the spam too).
Anyone else noticed this?
 

[#2]

It looks like Hostopia have introduced an additional MTA on the cluster (mailrelay3c50) which possibly has a poor reputation on the Plusnet anti-spam appliances. This seems to be causing some emails sent to Plusnet addresses to be blocked. Gmail seems suspicious too, a test message initially appeared in the spam folder.
Hopefully Plusnet will check the relevant MTA reputations on Monday.

[#3]

Thanks for checking .. I thought as much.
Have had some mail through this morning so hopefully resolved now 

[#4]

Not to repeat myself .. but seem to be having same problem again (as my post below) with emails not being received - looks like from my own PHP generated web pages, but of course have no way to know if others are being rejected ?

The gmail copies get through fine but not to my 'plusnet' mail. Have spam filtering on, which I will can turn off, but says that takes 48h hours to have effect.  

Any others noticed?

[#5]

Sending from Hostopia to Plusnet and Gmail addresses  is working for me.

I sent two messages, one using PHP mail() and one using SMTP, both set up in PHPMailer 6.0.1. Both messages came via mailrelay3c50. Which relay was used to send your messages received by Gmail?

I have Plusnet spam filtering on, though discard obvious spam is off.

[#6]

Thanks for reply David. I think the issue may have gone away (I hope) as seems to be working now. It does look like the ones getting through over weekend were on mailrelay2c50 and failing on mailrelay3c50 (both made it to gmail), but now have run a few tests and 3c50 has got through too.

Fingers crossed now  ..