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<p dir="auto">Yes! Brilliant. That's what I was missing. Thank you, John.</p>
<p dir="auto">On 22 Jan 2025, at 20:26, John Doherty wrote:</p>
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<p dir="auto">If you edit the IMAP settings for your fastmail account (File->Edit IMAP Account), is there an address pattern defined and enabled? That is, if dwpost.net is your domain, you might specify *@dwpost.net. Outgoing messages with From: addresses that match the pattern should use the outgoing SMTP server defined for that IMAP account.</p>
<p dir="auto">Pretty sure that's how it should work, anyway, and it seems to in quick tests that I just did.</p>
<p dir="auto">On Wed 2025-01-22 08:51 PM MST -0700, <a href="mailto:mm@dwpost.net">mm@dwpost.net</a> wrote:</p>
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<p dir="auto">Hi all,</p>
<p dir="auto">I can't figure this out, and hope someone can help. Maybe I'm just doing something dumb, but I can't see it. I'm using Version 2.0 (6203).</p>
<p dir="auto">It appears to me that MailMate is using the wrong SMTP server when I try to send using an arbitrary email on my domain, as Fastmail allows.</p>
<p dir="auto">FastMail allows creating a catchall address, which then allows sending and receiving using arbitrary usernames, i.e. <whatever>@domain.com.</p>
<p dir="auto">When I send from my regular email address on this account, i.e. my username for the account, it sends fine.</p>
<p dir="auto">However, when I send using one of these catchall addresses in the From field, it appears, from looking at the Activity Viewer, that MailMate switches to using the SMTP settings for a different account/domain, rather than the account/domain that I'm sending from. So, I get a "Not authorised to send from this header address" error.</p>
<p dir="auto">Any idea what's going on?</p>
<p dir="auto">Regards,</p>
<p dir="auto">David_______________________________________________<br>
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