Learn Hardcore Turkish: Bu e‑postaya filtre ekledim, önemli mesajlar otomatik olarak ayrı dizine gidiyor. - I added a filter to this email; important messages automatically go to a separate directory.

The ending is the dative case (-e/-a), meaning “to/into.”
Because e‑posta ends with a vowel, Turkish inserts a buffer y before a vowel-initial suffix: e‑posta + y + a → e‑postaya.
Vowel harmony picks -a (the last vowel in posta is a back vowel, a).
Hyphenated common words like e‑posta keep the hyphen when taking suffixes: e‑postaya.

Why isn’t it filtreyi? Why is filtre bare?

In Turkish, a direct object is bare when it’s indefinite/unspecified: filtre ekledim = “I added a filter.”
Use the accusative when the object is specific/definite: filtreyi ekledim = “I added the (known) filter.”
You can also say bir filtre ekledim to emphasize “one/a filter,” but it isn’t required.

What is the case pattern of eklemek in this meaning?

With the meaning “to add [X] to [Y],” the pattern is:
- Target/recipient: dative (‑e/‑a)
- Thing added: direct object (bare if indefinite, accusative if definite)
Examples:
- Hesabına yeni bir filtre ekledim. (I added a new filter to your account.)
- Hesabına bu filtreyi ekledim. (I added this filter to your account.)

Does Bu e‑postaya mean “to this email message” or “to this email account/address”?

Colloquially it often means the account/mailbox side of “email.”
To be clearer, especially in tech contexts, many speakers say Bu e‑posta hesabına filtre ekledim.
If you truly meant a single email message, you’d need a different phrasing (filters aren’t added to a single message).

Why isn’t it gidiyorlar since mesajlar is plural?

In 3rd person, plural agreement on the verb is often omitted with inanimate or non-human subjects. So mesajlar gidiyor is perfectly natural.
gidiyorlar is not wrong; it can sound a bit heavier or add emphasis to the plurality. With human subjects, the plural ending on the verb is more common.

Why use the present continuous gidiyor for a habitual result? Would gider be better?

Both can work, with nuance:
- gidiyor (present continuous): describes an ongoing situation or current behavior of the system (= “are going [these days/nowadays]”).
- gider (aorist): more general/habitual or instructional/technical tone (= “go (as a rule)”).
In UI texts or manuals, gider is frequent; in casual speech about what’s currently happening, gidiyor is very natural.

Why is it gidiyor and not gitiyor? Is gitmek irregular?

Yes, gitmek has an irregular present-continuous stem: gidiyor (not gitiyor).
A few common verbs do this: demek → diyor, yemek → yiyor, etmek → ediyor, gitmek → gidiyor.

What’s the difference between dizin and klasör?

dizin = “directory,” common in Unix/Linux/technical contexts.
klasör = “folder,” common in GUIs and everyday talk.
Both are acceptable here. Many users would say ayrı klasöre in everyday speech.

What nuance does ayrı have? Could I use başka or farklı? Do I need bir in ayrı (bir) dizine?

ayrı = “separate, distinct (not the same container).” Very natural with folders.
başka (bir) = “another/different one (from the default/current).”
farklı (bir) = “a different kind/one,” stressing difference rather than separateness.
bir is optional: ayrı dizine vs ayrı bir dizine. Adding bir often feels a bit more specific and natural in speech, but both are correct.

Is otomatik olarak the only way to say “automatically”? Can I drop olarak?

otomatik olarak is the standard adverbial form.
otomatikman is common and informal/colloquial.
kendiliğinden means “of its own accord/automatically” and is also fine here.
You will sometimes hear adjectives used adverbially (e.g., otomatik), but here otomatik olarak or otomatikman is more natural. There’s no standard otomatikçe.

Where can I place otomatik olarak in the sentence?

Turkish word order is flexible. All of these are fine:
- Önemli mesajlar otomatik olarak ayrı dizine gidiyor. (neutral)
- Önemli mesajlar ayrı dizine otomatik olarak gidiyor. (slight focus on destination first)
- Otomatik olarak önemli mesajlar ayrı dizine gidiyor. (emphasis on “automatically”)
The verb typically comes last; adverbs can appear before the object or the verb.

Is the comma between the two clauses okay? Should I use a conjunction?

Turkish tolerates comma joins more than English does, especially in informal writing.
For clearer logic, you can add a connector:
- Bu e‑postaya filtre ekledim, bu yüzden önemli mesajlar…
- …; dolayısıyla önemli mesajlar…
- … ve önemli mesajlar…
A semicolon is also fine in careful writing.

Can you break the forms down?

Do I need to say Ben ekledim, or is ekledim enough?

ekledim already marks 1st person singular; the subject pronoun is usually dropped.
Use Ben ekledim only for emphasis/contrast (“I did it, not someone else”).

Would a passive like gönderiliyor/taşınıyor/yönlendiriliyor be better than gidiyor?

All are possible, with different shades:
- gidiyor: neutral, colloquial (“they go to …”).
- gönderiliyor: “are being sent,” highlights the system doing the sending.
- taşınıyor / aktarılıyor: “are moved/are transferred,” common in mail client settings.
- yönlendiriliyor: “are being routed/forwarded,” technical.
Pick based on tone and the product’s terminology.

Could I say önemli olan mesajlar instead of önemli mesajlar?

önemli mesajlar = “important messages” (descriptive adjective).
önemli olan mesajlar = “the messages that are (the ones) important,” slightly more explicit/definite, often when a known criterion/label is in play.
Both are grammatical; the original is simpler and perfectly natural.