Message delivery delays?

[meichelman]

Anyone else experience significant delays in their email being delivered to the recipient? I'm on shared hosting, and recently it's been taking up to 8 hours to deliver simple text (email) messages. This has become an issue, as a few of my recent messages have been time sensitive.

How do I know? The email header timestamps the submission to mail.nozonenet.com, then timestamps the header again when it is passed to the receiving email server.

Marty

[NickCatal]

Are you using Steadfast's outgoing mail server? Is your ISP blocking it? Some ISPs block/manipulate external mail servers to prevent spam coming from inside their network.

[meichelman]

Yes, mail.nozonenet.com:465.

No, my ISP is not blocking it. It's a delay, not a bounce. And it's only occurring on some email, not all. One day an email to Person A will go through fine. The next day another email to Person A will take up to 8 hours to go through.

[NickCatal]

Did you submit a ticket to support about it?

I haven't had this issue. So...

[meichelman]

Not yet. I will if it continues, but I was checking to see if anyone else was experiencing the same and had already contacted Steadfast.

Thanks for the reply.

[misterd]

Does this happen to every destination?
I'm not using SF's mail server. I see 1-2 hours delivery delay from time to time. e.g. hotmail's MX receives email from my server at 00.00 and it shows up on recipient mailbox on 01.54.

[meichelman]

I cannot say whether it happens to every destination. It's been most notable delivering email to Cox's hosting mail server. And to pre-empt a reply, yes, I've contacted Cox regarding this same issue. Of course, their response will always be "not our problem".

The reason I brought it up here is if it was a problem of Steadfast email servers being rejected by Cox (or perhaps graylisted), it may be affecting other people hosted here.

[meichelman]

OK, I've narrowed this down for anyone interested. Sending an email to a distribution list of ~30 email addresses (company employees) that are all on a single domain hosted by Cox Business services results in the email being delayed by several hours to the majority of the recipients.

I assume this is because Cox servers are only allowing a set number of recipients per message. This is odd because I can send a single email message to any one of the recipients immediately following the distribution list email and the single email will be delivered instantly.