I cannot send email when on Koodo network (no problem if using wifi). What settings should I be using?

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Using iPhone 6. I can receive email no problem, outbound email though just sits in my outbox, unless I happen to be using a Wifi network (in other words, email is not being sent if I am using the Koodo network only). I have a 4Gb data plan with Koodo. The error occurs on all my email accounts (personal and work). Suggestions please?

You can imagine my frustration when I get home and discover that several of my outbound emails were never sent during the day, while only using the Koodo network. Any help will be SO MUCH appreciated!  :-)
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Stu2355

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Posted 2 years ago

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David, Mobile Master

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Did you bring the phone from another network?
You may need to go to Settings > Cellular > Cellular Data Options > Cellular Data Network > Reset settings.
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Stu2355

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Hi David. Thanks for replying. No, it's a Koodo iPhone. I'll try resetting as you suggest.
(Edited)
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Timo Tuokkola, Mobile Master

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On an iphone you should be able to add multiple outgoing servers. Add smtp.telus.net. Many companies block traffic from third party smtp servers to reduce network congestion due to spam.
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Stu2355

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Thanks Timo. I'll that a try and report back.
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David, Mobile Master

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Out of curiosity, what services are you using for email?

A Gmail SMTP server seems to work no matter what, if needed.
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Stu2355

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We are using a local ISP for hosting our mail, web pages and domains. We dont use Gmail as it is not considered secure by several of our clients (Google's privacy policies is an issue and several of the confidentiality agreements we have signed with clients stipulate this). 
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David, Mobile Master

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AHA!
Check with your ISP supplier to see if they use a different port when connecting from an outside or a mobility connection. I had the problem with my telus.net account not sending unless I was connected through a Telus subscriber's network connection. A change of outgoing port allowed me to send through any provider.
 
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Stu2355

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Since I got back from Europe a couple of weeks ago, I am back to not being able to send any emails via my iPhone when the phone is only on the Koodo cellular network. Using smtp.telus.net for the outgoing server used to work, port 587 but no longer. I have tried different ports (25, 1025, 587) and I get the error message "The connection to the server smtp.telus.net on port 587 timed out". I get the same message for for any of the ports that I try BTW. SSL is off, authentication is set to password (as per email hosting provider). Any suggestions much appreciated ... I am baffled as to why this issue has come back :-)
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David, Mobile Master

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Port 587 now uses SSL, and I believe you need Telus ISP credentials to send mail through that server.
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Stu2355

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What would you advise please as an alternative? At the moment, all my emails remain unsent in my outbox until I connect to wifi. Thanks
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David, Mobile Master

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What is your ISP's SMTP server? You should be able to connect to that one to send mail.
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Stu2355

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Hi David. That is the problem ... I cannot connect to our SMTP server over the Koodo cellular network, only when on wifi does it work. I had a secondary server setup using Telus (while on the cellular network) but it no longer works. I had set that up as per the advice given in this forum. We use Rogers for our high speed internet connection, and I have my own domain that I use for mail (it is hosted by Rebel.ca). I don't have Telus/Koodo ISP credentials and the advice to date has not suggested that I need that. Is that what you use?
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David, Mobile Master

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I use credentials from each of the ISP I use for email services to connect to their servers: Telus, Gmail, Gmx, Yahoo, iCloud, and a few private ones as well. Telus was a problem for a while, as it was not possible to connect to the Telus SMTP server from another network. They have since corrected that issue. While that was a problem, I used Gmail SMTP to send mail from my Telus account.