Mail: unable to send from one domain

Question

Level 1

4 points

Mail: unable to send from one domain

I'm not sure if this started immediately or shortly after upgrading to Yosemite, but it certainly wasn't happening before:

Mac Mini (Late 2012), 2.5GHz, 16GB RAM, 500GB, OSX 10.10 Yosemite, Mail 8.0 (1990.1)

I have 14 mail addresses set up in Mail (all IMAP). Three of them run from the same .com domain (via Heart Internet), and I am unable to send outgoing mail from them. All my other addresses work fine - including iCloud, Gmail and other .com domains running through Heart Internet.

I have done the following with no positive outcome:

Checked the outgoing SMTP server - all correct

Deleted one of the email accounts and added back as new

Deleted all accounts and removed all SMTP servers related to that domain from list in Mail, and added one address on that domain back as new.

Zapping PRAM

After doing some reading on this and other forums, I thought it may be a problem with my ISP or firewall. However, I can send from my iPhone (on WiFi network) and MacBook Pro, and have installed Postbox and AirMail (email clients) on the Mac Mini, both of which are able to send mail from this domain, and others, with no problem. So that seems to rule out ISP/firewall problems.

Postbox and AirMail are okay, but my workflow has slowed adjusting to new layouts. I want Mail back. I'm hoping I've missed something really obvious. Any help greatly appreciated.

Thanks,

Jo

Mac Mini (Late 2012), 2.5GHz, 16GB RAM, 500GB

OSX 10.10 Yosemite

Mail 8.0 (1990.1)

Posted on Oct 30, 2014 11:43 AM

Reply

Answer 1

Linc Davis

Level 10

209,739 points

Oct 30, 2014 8:23 PM in response to Jolly-on

What exactly happens when you try to send?

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Answer 2

Jolly-on Author

Level 1

4 points

Oct 31, 2014 12:32 AM in response to Linc Davis

Compose message.

Click 'send'.

Mail moves message to Outbox

- unusual in itself as other messages are sent without the Outbox needing to be visibly 'activated' by Mail.

Message stays in Outbox until I delete or move it to Drafts.

Checking the Activity window shows that Mail is stuck trying "connecting to server...".

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Answer 3

Linc Davis

Level 10

209,739 points

Oct 31, 2014 8:19 AM in response to Jolly-on

From the Mail menu bar, select

Window ▹ Connection Doctor

Click the Show Detail button. A drawer opens. Try to send a message and post the text that appears. Anonymize any personal information before posting.

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Answer 4

Jolly-on Author

Level 1

4 points

Oct 31, 2014 8:34 AM in response to Linc Davis

Hi Linc,

Thanks for taking the time to respond, but I 'm not sure I want to post any of that data: a) there's a **** of a lot of it and, b) other than the domain name I don't know which data could be interpreted or used as personal info. I guess I'll have to do direct to Apple, unless you have any other suggestions.

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Answer 5

Linc Davis

Level 10

209,739 points

Oct 31, 2014 8:55 AM in response to Jolly-on

OS X Mail: Troubleshooting sending and receiving email messages

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Answer 6

Jolly-on Author

Level 1

4 points

Nov 3, 2014 10:53 AM in response to Jolly-on

After long call with Apple Support, the issue was discovered: the SMTP server (via Heat Internet) appears to be sensitive to any changes in port number. All it needed was "Automatically detect and maintain account settings" to be unchecked.

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